Unify tense in CHANGELOG

* Fix irb, rake, rdoc, ri for rbx-2.2.1

#### 20131206

* Added a definition for JRuby 1.7.9

* Add JRuby 1.7.9

#### 20131122.1

* Fix typo in 2.1.0-preview2 definition

#### 20131122

* Added a definition for 1.9.3-p484

* Added a definition for 2.0.0-p353

* Added a definition for 2.1.0-preview2

* Add Ruby 1.9.3-p484

* Add Ruby 2.0.0-p353

* Add Ruby 2.1.0-preview2

#### 20131115

* Added a definition for JRuby 1.7.7

* Added a definition for JRuby 1.7.8

* Add JRuby 1.7.7

* Add JRuby 1.7.8

#### 20131030

* Install the Rubinius bundle in isolation

* Use libyaml from Homebrew if available

#### 20131024

* Added a definition for JRuby 1.7.6

* Added a definition for Rubinius 2.1.0

* Added a definition for Rubinius 2.1.1

* Add JRuby 1.7.6

* Add Rubinius 2.1.0

* Add Rubinius 2.1.1

#### 20131008

* Added a definition for JRuby 1.7.5

* Added a definition for Rubinius 2.0.0

* Add JRuby 1.7.5

* Add Rubinius 2.0.0

#### 20130923

* Added a definition for 2.1.0-preview1

* Add Ruby 2.1.0-preview1

#### 20130907

* Revert using mirror site

* Change protocol of the ruby-lang.org server from HTTP to FTP

#### 20130628

* Added a definition for Ruby 2.0.0-p247

* Added a definition for Ruby 1.9.3-p448

* Added a definition for Ruby 1.8.7-p374

* Added a definition for MagLev 2.0.0-dev from git

* Add Ruby 2.0.0-p247

* Add Ruby 1.9.3-p448

* Add Ruby 1.8.7-p374

* Add MagLev 2.0.0-dev from git

* Use Homebrew openssl if available

#### 20130518

* Added a definition for JRuby 1.7.4

* Add JRuby 1.7.4

#### 20130514

* Added a definition for Ruby 2.0.0-p195

* Added a definition for Ruby 1.9.3-p429

* Added a definition for Ruby 1.9.2-p0

* Added a definition for Ruby 1.9.1-p430

* Add Ruby 2.0.0-p195

* Add Ruby 1.9.3-p429

* Add Ruby 1.9.2-p0

* Add Ruby 1.9.1-p430

#### 20130501

* Cache git clone directory

* Default RBENV_VERSION to the globally-specified Ruby

#### 20130408

* Added a definition for mruby-dev

* Added a definition for topaz-dev :gem:

* Add mruby-dev

* Add topaz-dev :gem:

* List matching definitions on ambiguous version specification

* Use `--continue` when downloading tarball

* Keep source tarball if `--keep` or `tar xf` fails

* Build a shared openssl to link to Ruby 2.0.0

#### 20130225

* Added a definition for 2.1.0-dev

* Add Ruby 2.1.0-dev

* Rename the CAfile to cert.pem

* Fix exit status of install with verbose

#### 20130224

* Happy 20th :birthday:, Ruby!

* Added a definition for 2.0.0-p0

* Add Ruby 2.0.0-p0

* Autoclean on unsuccessful installation

#### 20130222

* Upgraded to OpenSSL 1.0.1e

* Added a definition for JRuby 1.7.3

* Added a definition for 1.9.3-p392

* Upgrade to OpenSSL 1.0.1e

* Add JRuby 1.7.3

* Add Ruby 1.9.3-p392

#### 20130208

* Added a definition for 2.0.0-rc2

* Add Ruby 2.0.0-rc2

* Build OpenSSL for Ruby 2.0 on OS X

#### 20130206

* Added a definition for 1.9.3-p385

* Add Ruby 1.9.3-p385

#### 20130129

* Changed `rbenv install` to attempt to install the local app-specific

* Change `rbenv install` to attempt to install the local app-specific

  version when it is invoked without any arguments

* Added interactive confirmation to `rbenv install` when the

  destination prefix exists. Pass `-f` or `--force` to force

  installation of versions that are already installed

* Added support for specifying which program to use for `make` via the

  `$MAKE` environment variable. FreeBSD users can now instruct

  ruby-build to use GNU make by setting `MAKE=gmake`

* Modified the post-install process to invoke `chmod` only for group-

  or world-writable directories

* Added `before_install` and `after_install` hooks for `rbenv install`

  plugins to facilitate post-installation automation

* Add interactive confirmation to `rbenv install` when the destination prefix

  exists. Pass `-f` or `--force` to force installation of versions that are

  already installed

* Add support for specifying which program to use for `make` via the `$MAKE`

  environment variable. FreeBSD users can now instruct ruby-build to use GNU

  make by setting `MAKE=gmake`

* Modify the post-install process to invoke `chmod` only for group- or

  world-writable directories

* Add `before_install` and `after_install` hooks for `rbenv install` plugins to

  facilitate post-installation automation

#### 20130118

* Added a definition for 2.0.0-rc1

* Added a definition for 1.9.3-p374

* Add Ruby 2.0.0-rc1

* Add Ruby 1.9.3-p374

#### 20130104

* Added a definition for JRuby 1.7.2

* Add JRuby 1.7.2

#### 20121227

* Added a definition for Ruby 1.9.3-p362

* Added a definition for Ruby 1.8.7-p371

* Moved the default ruby-build mirror from GitHub Downloads to Amazon

  CloudFront

* Add Ruby 1.9.3-p362

* Add Ruby 1.8.7-p371

* Move the default ruby-build mirror from GitHub Downloads to Amazon CloudFront

#### 20121204

* Added a definition for JRuby 1.7.1

* Add JRuby 1.7.1

#### 20121201

* Added a definition for Ruby 2.0.0-preview2

* Add Ruby 2.0.0-preview2

#### 20121120

* Added optional package checksum support. When a package URL is

  annotated with an MD5 checksum, ruby-build will use it to verify

  the contents of the downloaded file. Package URLs in all existing

  definitions have been updated with checksum annotations

* Added an optional package download cache. When the

  `RUBY_BUILD_CACHE_PATH` environment variable is set to a directory

  of your choice, ruby-build will store downloaded packages there and

  reuse them for future installations

* Added mirror support for faster package downloads. Packages on the

  official ruby-build mirror will be served via S3. You can point

  ruby-build to your own local package mirror by setting the

  `RUBY_BUILD_MIRROR_URL` environment variable

* Add optional package checksum support. When a package URL is annotated with

  an MD5 checksum, ruby-build will use it to verify the contents of the

  downloaded file. Package URLs in all existing definitions have been updated

  with checksum annotations

* Add an optional package download cache. When the `RUBY_BUILD_CACHE_PATH`

  environment variable is set to a directory of your choice, ruby-build will

  store downloaded packages there and reuse them for future installations

* Add mirror support for faster package downloads. Packages on the official

  ruby-build mirror will be served via S3. You can point ruby-build to your own

  local package mirror by setting the `RUBY_BUILD_MIRROR_URL` environment

  variable

#### 20121110

* Added a definition for Ruby 1.9.3-p327

* Add Ruby 1.9.3-p327

* Fetch Ruby 2.0.0.dev and 1.9.3.dev via Git instead of Subversion

#### 20121104

* Added a definition for Ruby 2.0.0-preview1

* Added a definition for Rubinius 2.0.0-rc1

* Add Ruby 2.0.0-preview1

* Add Rubinius 2.0.0-rc1

#### 20121022

* Added a definition for JRuby 1.7.0

* Add JRuby 1.7.0

#### 20121020

* Added a definition for Ruby 1.9.3-p286

* Added a definition for JRuby 1.7.0-rc2

* Added a definition for JRuby 1.7.0-rc1

* Added a definition for JRuby 1.6.8

* Added a definition for JRuby 1.5.6

* Add Ruby 1.9.3-p286

* Add JRuby 1.7.0-rc2

* Add JRuby 1.7.0-rc1

* Add JRuby 1.6.8

* Add JRuby 1.5.6

* Fetch Ruby 2.0.0.dev via Subversion instead of Git

* Allow hooks to be defined for `rbenv-install`

#### 20120815

* Added a definition for MagLev 1.1.0-dev from git

* Added a definition for Ruby 1.8.7-p370 (for those having trouble

* Add MagLev 1.1.0-dev from git

* Add Ruby 1.8.7-p370 (for those having trouble

  installing 1.8.7 with newer versions of glibc, please see

  https://github.com/sstephenson/ruby-build/pull/195#issuecomment-7743664)

* Updated the package URL in the definition for JRuby 1.7.0-preview1

* Added a definition for JRuby 1.7.0-preview2

* Updated the Rubinius 2.0.0-dev definition to use the bundled

  RubyGems version instead of installing its own

* Added an `rbenv uninstall` command for removing installed versions

* Update the package URL in the definition for JRuby 1.7.0-preview1

* Add JRuby 1.7.0-preview2

* Update the Rubinius 2.0.0-dev definition to use the bundled RubyGems version

  instead of installing its own

* Add an `rbenv uninstall` command for removing installed versions

* Improved the option parsing for `ruby-build` and `rbenv-install` so

  options may be placed in any order, and short options may be

  combined (e.g. `-kv`)

* Added a `-l`/`--list` option to `rbenv install` to list all

  available definitions

* Added a `-v`/`--verbose` option to `rbenv install` to invoke

  `ruby-build` in verbose mode

* Add a `-l`/`--list` option to `rbenv install` to list all available

  definitions

* Add a `-v`/`--verbose` option to `rbenv install` to invoke `ruby-build` in

  verbose mode

* Documented the `-k`/`--keep` flag in the command-line help for

  `ruby-build` and `rbenv install`

#### 20120524

* Added definitions for JRuby 1.6.7.2 and 1.7.0-preview1

* Add JRuby 1.6.7.2 and 1.7.0-preview1

* Removed the definition for JRuby 1.7.0-dev (in general we do not

  like to remove definitions, but the JRuby team has deleted the

  1.7.0-dev package from their servers -- caveat emptor)

* Added support for specifying the build location with the

  `RUBY_BUILD_BUILD_PATH` environment variable

* Added a `-k`/`--keep` flag to `ruby-build` and `rbenv install` for

* Add a `-k`/`--keep` flag to `ruby-build` and `rbenv install` for

  keeping the source code around after installation

* Updated the readme to emphasize installation as an rbenv plugin

* Update the README to emphasize installation as an rbenv plugin

#### 20120423

* Improved error messages when dependencies are missing

* XCode 4.3+ may be used to build 1.9.3-p125 and later

* Updated all Ruby 1.9.2 and 1.9.3 definitions to RubyGems 1.8.23

* Added definitions for REE 1.8.7-2012.02 and 1.8.7-2009.10

* Added definitions for JRuby 1.6.7

* Added definitions for Ruby 1.9.2-p318, 1.9.2-p320, and 1.9.3-p194

* Update all Ruby 1.9.2 and 1.9.3 definitions to RubyGems 1.8.23

* Add REE 1.8.7-2012.02 and 1.8.7-2009.10

* Add JRuby 1.6.7

* Add Ruby 1.9.2-p318, 1.9.2-p320, and 1.9.3-p194

#### 20120216

* Added definitions for REE 1.8.7-2011.12 and 1.8.7-2012.01

* Added definitions for JRuby 1.6.5.1 and 1.6.6

* Added definitions for Ruby 1.8.7-p358 and 1.9.3-p125

* Updated the readme with instructions for installing ruby-build as an

  rbenv plugin

* Add REE 1.8.7-2011.12 and 1.8.7-2012.01

* Add JRuby 1.6.5.1 and 1.6.6

* Add Ruby 1.8.7-p358 and 1.9.3-p125

* Update the README with instructions for installing ruby-build as an rbenv

  plugin

#### 20111230

* Added a definition for MagLev 1.0.0

* Add MagLev 1.0.0

* Added support for overriding `make` options with the

  `$MAKEOPTS`/`$MAKE_OPTS` environment variable

* Removed RubyGems installations from JRuby definitions in favor of

  the bundled RubyGems versions

* Added a `before_install_package` hook

* Added definitions for REE 1.8.7-2009.09 and 1.8.7-2010.01

* Added definitions for Ruby 1.8.6-p383, 1.8.7-p302 and 1.8.7-p357

* Updated the JRuby 1.7.0-dev snapshot URL

* Add a `before_install_package` hook

* Add REE 1.8.7-2009.09 and 1.8.7-2010.01

* Add Ruby 1.8.6-p383, 1.8.7-p302 and 1.8.7-p357

* Update the JRuby 1.7.0-dev snapshot URL

* Changed the GCC detector to look for `gcc-*` anywhere in the

  `$PATH`, not just `/usr/bin`

#### 20111030

* Added a Ruby 1.8.7-p334 definition

* Add Ruby 1.8.7-p334

* Renamed the 1.9.4-dev definition to 2.0.0-dev to reflect the new

  version numbering scheme

* ruby-build now automatically displays the last 10 lines of the error

  log, if any, when a build fails

* Improved the GCC detection routines and added a more helpful error

  message for Xcode 4.2 users

* Improve the GCC detection routines and add a more helpful error message for

  Xcode 4.2 users

* JRuby installation no longer requires the install prefix to exist

  first

* You can now pass `$CONFIGURE_OPTS` to the REE definitions

* Added a JRuby 1.6.5 definition

* Added a Ruby 1.9.2-p180 definition

* Added a Ruby 1.9.3-p0 definition

* Add JRuby 1.6.5

* Add Ruby 1.9.2-p180

* Add Ruby 1.9.3-p0

#### 20110928

* ruby-build now uses the `--with-gcc` configure flag on OS X Lion

* Added definitions for REE 1.8.7-2010.02 and 1.8.6-2009.06

* Add REE 1.8.7-2010.02 and 1.8.6-2009.06

* Modified `rbenv-install` to run `rbenv rehash` after installation

* Added a Ruby 1.9.3-rc1 definition

* Updated the JRuby defintions to install the `jruby-launcher` gem

* Updated the rbx-2.0.0 definition to point to the master branch

* Added a jruby-1.7.0-dev definition

* Added a Ruby 1.9.4-dev definition

* Add Ruby 1.9.3-rc1

* Update the JRuby defintions to install the `jruby-launcher` gem

* Update the Rubinius 2.0.0 definition to point to the master branch

* Add JRuby 1.7.0-dev

* Add Ruby 1.9.4-dev

#### 20110914

* Added an rbx-2.0.0-dev definition for Rubinius 2.0.0 from git

* Add Rubinius 2.0.0-dev for Rubinius 2.0.0 from git

* Added support for setting `./configure` options with the

  `CONFIGURE_OPTS` environment variable

* Added a 1.9.3-dev definition for Ruby 1.9.3 from Git

* Added support for fetching package sources via Git

* Added an `rbenv-install` script which provides an `install` command

  for rbenv users

* Add Ruby 1.9.3-dev from git

* Add support for fetching package sources via git

* Add an `rbenv-install` script which provides an `install` command for rbenv users

#### 20110906.1