Moved some AI spawns so as to not make gameplay unfair while keeping element of tactical wit.
Added saving feature and checkpoint (intended really for singleplayer).
Added brief for players to get information and immersion into the story.
Shortened lengthy task descriptions.
Added second armed pickup to accommodate 4 players. (Thanks to Rumpus Krampusson).
Small changes to player loadouts.
Fixed bug where AI would spawn in odd locations.
AI should not wonder away from play area as much.