Version RC1A

- Fixed missing countdown sounds
- Updated menu photos vgui
- Fixed being able to place engineer buildings behind a gate and in the blu cave
- Slight lighting changes
- Added few details
- Fixed some prop fade and weird shadows
- Fixed being stuck above the frozium pipe on the tower C
- Fixed not being able to place stickies on the tower C
- Fixed a visual brush bug under the frozium pipe on the tower C