Created Enemy class

Created the Enemy abstract class that will be used by all the enemies
to receiveDamage();
Laser Collider

Created the laser collider.
Merge branch 'master' of https://github.com/JordanLingHua/cs113Project

Conflicts:
	cs113Project/Library/CurrentLayout.dwlt
	cs113Project/Library/CurrentMaximizeLayout.dwlt
	cs113Project/Library/assetDatabase3
	cs113Project/cs113Project-csharp.sln
	cs113Project/cs113Project.sln
	cs113Project/cs113Project.userprefs