IT should be noted that ClientManager::CheckConnections() no longer
removes a client; instead, it returns a client index that needs to be
removed via another means. This allows ServerApplication to use the 'full
unload' method.
* Fleshed out the ClientManager internals
* Folded some ServerApplication methods into ClientManager
* Removed Manager references from ServerApplication
* Corrected server_methods.cpp (compiles)
Kayne Ruse