[MP] Check for tempSpectate consistently across the code.
[MP] Added some extra temp spectate checks.
[MP] Fix a bunch of array comparisons to null which have no effect.
[MP] String safety fixes in bg_saga
[MP] Fix a menu error reporting about SP's text file.
[JK2SP] Removed the C++11 depencency from g_savegame.cpp.
[JK2SP] G_Timer.cpp no longer uses <unordered_map>.