Big September Update

This is a huge update that includes tons of bug fixes and tweaks to the missions to make them more fun.
- Improved several missions to make them less chaotic and more engaging firefights (For example, the bomb mission that takes place on bridge, the train station mission, and many more )
- Improved Enemy AI to behave more intelligently indoors. When a player opens a door, the enemy will react to the door and try to run for cover.
- Added more dynamic movements to the enemy AI. They now dive for cover, making them harder to hit and giving the firefights a cinematic flair.
- Fixed a bug with dying on ladders, the player is stuck on the ladder
- Fixed a bug with drones sometimes flying too high..
- Fixed bug with the yellow flashing icon that locates hostages sometimes not appearing
- Reduced memory usage by cleaning up and consolidating a lot of assets
- Fixed annoying bug where the enemies in vehicles would sometimes appear to be floating in mid-air like aliens
- Fixed footsteps not working for characters holding melee weapons
- Reduced the stutter that occurs when flashbangs go off
- Fixed a bug related to players with high ping would sometimes purchase items in the store TWICE, if they clicked on a buy button