Misc updates

- Added enemySentinel class
- pathPatterns now spawn Sentinels
- Removed resources folder to decrease overall file size
Changes to bullets

- Still not satisfied with the way enemy bullets work
- Added Enenmy Bullet purple
- Puple fires straight bullets, at a slight angle
Missile pickup

- Added missile pickup
- Tweaked boss values
Cleaned up various bits of code

- About to remove Vincent's input code, and use the old stuff