Added Basic Unit Purchasing

Added very basic unit purchasing. Still have to tweak it so they're
placed in the right spot. The units don't attack anything yet
Updated Unit Purchasing
Updated Arrows

Moved the location of the playerArrows array to the player layer
Basic Friendly/Enemy collision detection

basic detection. currently crashes though. fixing it later
Fixed Unit Collision Detection

I fixed the detection, and it mostly works, but there's still a bug
somewhere. I think it has to do with coliding with multiple enemies
Merge remote-tracking branch 'origin/Working'
Merge branch 'master' of https://github.com/MarkM941/Crimson-Castle
Cleaned up Repo