Work from school 10/16 (LEVELS!)

- Added level up system to replace drops
- Added spawns to the heavy boss
- Added homing missile pattern to the dragon
- Changed dragon spawns to only be hunters
- Changed minibosses to be knocked back less
- Changed Solars to not be affected by knockback
- Changed scaling on shield regen to be better early
- Changed players to now start with the shield
- Fixed health pack drops
- Fixed the Blink ability
- Increased size of piercing arrow
- Lowered the damage on KO Cannon
- Lowered the cooldown on Decimation