Internal refactoring and cleanup.

* Changed KineticPDU to KineticRequest to finish seperation between request and responses.
* Broke up kinetic_pdu into kinetic_respone and kinetic_bus.
* Changed KineticPDU_InitWithCommand to KineticRequest_Init.
* Changed KineticClient_Put to validate value buffer length while building operation to clean up operation handling.
* Changed value payload handling to always use value array in KineticOperation for clean/consistent use and eliminated valueEnabled and sendValue attributes.
* Various test cleanup per refactoring, removed extraneous logging in tests.