v1297 - Post Traumatic Squirrel Disorder

- NEW FEATURE: Difficulty Levels
- NEW FEATURE: Soldier PTSD recovery time after missions
- MULTIPLAYER FIX: moveable object replication
- ACHIEVEMENT FIX: end game mission achievement
- UI FIX: map selection image change
- WEAPON FIX: plasma launcher
- UI UPDATE: clean up scoreboard
- FIX: specials spawn rate