Created a SpeedUp class that speeds everything accordingly

https://github.com/ugly-potato-guy/potato-tap/issues/39
Merge remote-tracking branch 'origin/master'

Conflicts:
	core/src/com/github/uglypotatoguy/entities/Entity.java
	core/src/com/github/uglypotatoguy/screens/PlayScreen.java
Fixed merge
Merge remote-tracking branch 'origin/master'