Various updates

Have made some significant changes.

• Various script adjustments and optimisations

• additional animation frames for Shane, Sanchez, Samson, Cop NPC

• Various AI adjustments

• Various adjustments to FPS system and stages

• a Few other tweaks and adjustments

As always let me know your thoughts on the game. We could really do with a few more positive reviews and some word of mouth to help the game find its audience !