Building client channels out of tree does not work reliable as the dependencies can not be easily split. (exceptions may be simple ones as echo channel) It does complicate the build system and code though, so remove this for maintainability reasons.
* Unified enum/struct definitions, fixed include issues * Fixed mac compilation issues * Added missing include * Fixed windows server build warnings * Fixed VS2010 build issue * Removed unnecessary library linking * Fixed ThreadPool WinXP compatibility * Fixed pr review remarks
