Containment: The Zombie Puzzler Updated

Post-PAX Feedback Patch
- Added Act and Chapter headings at the beginning of each campaign level.
- Added final block text to each level that isn't a boss fight.
- Added Checkpoints so you can leave the game and resume at the same block. These are stored in Steam Stats so they are secured on Steam servers and work like a cloud save.
- More fixes to animations not always triggering an event.
- Added a fix that would sometimes prevent the game from proceeding when a dude was killed.
- Fix Gorilla texture.

Let us know if you have any feedback or find bug