zBLOCK 4.5 RC3

Compatible with the 30/09/2010 game update.
-Removed functionality which is now implemented into the game by the VALVe/Hidden Path Entertainment partnership.
-Fixed a crash which could occur whilst "zb_active 0" was set.
-Client "net_graph" values are no longer checked when warmode is disabled.
-"sv_nostats" is no longer a locked cvar.
-Locked several newly introduced cvars (which have competitive implications) whilst warmode is enabled:
sv_allowminmodels 1
sv_competitive_minspec 1
sv_enableboost 0
sv_enablebunnyhopping 0
sv_ladder_dampen 1
sv_legacy_grenade_damage 0