phonetic keys can begin with vowel + added missing \'z\' to consontants

// Generate a phonetic key

PhoneticKeyGenerator.prototype.createKey = function(keyLength) {

  var text = '';

  var start = Math.round(Math.random() * 2);

  for (var i = 0; i < keyLength; i++) {

    text += (i % 2 == 0) ? this.randConsonant() : this.randVowel();

    text += (i % 2 == start) ? this.randConsonant() : this.randVowel();

  }

  return text;

};

PhoneticKeyGenerator.consonants = 'bcdfghjklmnpqrstvwxy';

PhoneticKeyGenerator.consonants = 'bcdfghjklmnpqrstvwxyz';

PhoneticKeyGenerator.vowels = 'aeiou';

// Get an random vowel