Release.

Changes from Final Beta (RP_Littletown_Test) to release version:

- added new apartment building opposite to the doctors
- added some props
- added some cables
- added airplane flying by (every 10 to 45 minutes)
- added two new ladders at canal
- added 2 new sprays
- added door in metal warehouse
- added basement to abandoned building
- fixed ambient sounds (they are a bit quieter now)
- fixed BnL song and tv repeating needs more time
- fixed gaps between handrails at the canal
- fixed nothing, except props, can be moved or "tool-gunned" anymore
- fixed fog changing back to surface-fog when player died in underground
- reduced flickering textures to a minimal possible value without reducing the maps quality
- reduced shadow sharpness at some places to reduce those flickering textures
- reduced reflections
- reduced range of window-fading
- removed props blocking the player's and door's way