Merge pull request #9 from gnomicstudios/eb_gamejam

Eb gamejam
Merge pull request #10 from gnomicstudios/eb_gamejam

Scaled down knight and moved border
Enemy manager and updated backgrounds
Merge branch 'master' of https://github.com/gnomicstudios/GGJ13 into aranda
Enemies integrated with physics
Merge pull request #11 from gnomicstudios/aranda

Updated backgrounds and added enemies
Implementing behaviour tree (W.I.P)
Merge remote-tracking branch 'origin/master' into eb_gamejam
Renamed EnemyManager to UnitManager