* Changed thrift function call wrapper to be more explicitly named and to perform more safety checks.
* Moved Jitter function from realis to retry.
* API code is now more uniform and follows a certain template.
* Lock added whenever a thrift call is made or when a modification is done to the connection. Note that calling ReestablishConn externally may result in some race conditions. We will move to make this function private in the near future.
