Improved sound mixing
(and hopefully didn't break anything)

4th level - limited the max speed of the ship, to make repairs more important

-5th level - Antlions now better navigate through the fallen walls and are more aggressive
- Alarm at end of each wave
- Fixes to avoid a rare bug
- Sound/light when the Radio Tower gets attacked

- 1st level - Electric water does less damage

Friendly Combine will be more willing to follow the player in the museum section(hopefully this won't result into them bumping into the player)

Post-judging update
-------------------------
- 1st level
- Enemy soldier in the basement no longer turns at the player when in stealth mode
- The flashlight should be easier to locate in dark; glow effect added
- Added tutorial for how to grab the custom guns
- Some other minor player-direction clues

- 2nd level
- Increased performance by lowering number of enemies that are spawned at once(new spawn as the player kills enemies)

- 4th level
- decreased health of the enemies you fight in the dock

- 5th level
- Lowered scope distance to make it easier to kill enemies on the towers
- Added tutorial for using the custom guns
- Music in the last wave should no longer stop after a save is loaded
- Nerfed mounted machineguns a little bit

Created Invasion - #VM5.