Enemies Shooting, added basic station, textures

Added grid stuff, the marker for enemies. Added Enemy shooting, and the
basics of the space station.
Enemies firing correctly, Bullets have FireMode

Now we can implement the powerup and defense stuff.
Merge branch 'master' of https://github.com/jah6842/Juicy

Conflicts:
	DX11_Game/DirectX11_Starter/Constants.cpp
	DX11_Game/DirectX11_Starter/Constants.h