April 30, 2010 Patch

Patch notes

Added further PropHunt mode support.
- Added a "SetCustomModelRotates" input, which will enable/disable whether the custom model should rotate yaw (enabled by default).
- Added a "SetCustomModelVisibletoSelf" input, which will set whether or not the local player should see his own custom model.
Fixed the Engineer being able to build more than 1 of each type of building.
Fixed old Engineer build keybinds not working with the new system.
Fixed a client crash on shutdown.
Fixed the Gunboats not properly applying the damage reduction when Spectators are nearby.
Fixed post-processing bug which could cause tone mapping to become stuck at highest setting.