* Moved 'm_pFileSystem' to 'CSourceAppSystemGroup' (actually belongs there, CAppSystemGroup has to be 0xA8 in size in order for 'm_bDedicated' to line up in 'CModAppSystemGroup').
* Prefixed all static functions with 'Static' to avoid name collisions.
Destruvtor is prepended on every class in-engine. Reflected in SDK. Also removed extraneous method from ICvar causing other methods below it to misalign after the IAppSystem change.
