Moved server/client headers and implementations into dedicated subfolder.
Renamed Some classes to match the game binary (e.g. CBaseClient is now CClient).
Removed redundant files.
* Move most definitions to implementation file to avoid recompiling whole program for small changes
* Pass strings by reference for where possible.
* Split Module class to dedicated file.
* Add const qualifiers to all eligible methods for address/module class
* Some renaming
* Add CServerGameDLL interface to SDK (unfinished)
* Inline all CHostState members. Calling discrete member functions will result in a corrupt stack. It also alters with the VTable layout in the engine since we assign our SDK instance directly to it. Forcing everything to be inline (like the assembled counterpart within the executable itself) will ensure no virtual calls will get created and misalign the base VTable.
* Patch SQVM_CompileError to call SQVM_Error with the severity flag set to false (0 = do not terminate process, 1 is terminate process).
