Doxygen comments in GameplayCommunication.cpp

All existing comments were converted to Doxygen style comments in the
GameplayCommunication.cpp file.
Doxygen comments for more files [Network].

Converted to Doxygen style comments for more functions and files in the
Network component.
Doxygen comments for more files in Network.

All files except ServerCommunication.cpp are done.
Converted existing comments to Doxygen style.

Comments for some functions are remaining. Other than those, all
comments in the Networking component have pretty much been ported to
Doxygen style now.

Documentation will be generated and added soon.