Eliminate need for gEntList gamedata on tf2/sdk2013 and soon dods/css/hl2dm.
Missing changes from last commit
Eliminate need for s_pTempEnts gamedata on sdk2013 and soon css/dods/hl2dm (already on tf2).
Eliminate need for sv gamedata on sdk2013 and soon css/dods/hl2dm (already on tf2).
Eliminate need for FindEntityByClassname gamedata on sdk2013 and soon css/dods/hl2dm (already on tf2).
Merge pull request #174 from alliedmodders/eliminate-more-gamedata

Eliminate the need for more gamedata on some games (r=asherkin).