Collisions between the bullets and the enemy have been added

The enemy will now die if hit by a bullet
Merge remote-tracking branch 'origin/master'

Conflicts:

	pairproject/FlappyBird/bin/Debug/FlappyBird-unsigned/Application/app.exe

	pairproject/FlappyBird/bin/Debug/FlappyBird-unsigned/Application/app.exe.mdb
	pairproject/FlappyBird/obj/Debug/app.exe
	pairproject/FlappyBird/obj/Debug/app.pdb
	pairproject/FlappyBird/obj/Debug/convertedpdb/app.exe.mdb