Merge pull request #3 from jakerose27/master

Background, sprite draw refactor, and button animation.
Bug fixes.
Implements hydration mechanic for puddling and shooting.
Cannon and fireball basics, green tiles!
Merge branch 'master' of https://github.com/rliebz/Puddle
Use GameTime object
Cannon and fireballs.
Merge branch 'GameTime' of https://github.com/rliebz/Puddle

Conflicts:
	Objects/Player.cs