bullets now collide with tiles and properly erase
Merge branch 'master' of https://github.com/videogameguy/XNAPWN

Conflicts:
	WeakSven/WeakSven/bin/x86/Debug/WeakSven.exe
	WeakSven/WeakSven/bin/x86/Debug/WeakSven.pdb
	WeakSven/WeakSven/bin/x86/Debug/XNA_GUI.dll
	WeakSven/WeakSven/bin/x86/Debug/XNA_GUI.pdb
	WeakSven/WeakSven/obj/x86/Debug/ContentPipeline-{A3936EFA-AB81-4292-B172-4B675DF12269}.xml
	WeakSven/WeakSven/obj/x86/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	WeakSven/WeakSven/obj/x86/Debug/WeakSven.csproj.FileListAbsolute.txt
	WeakSven/WeakSven/obj/x86/Debug/WeakSven.csprojResolveAssemblyReference.cache
	WeakSven/WeakSven/obj/x86/Debug/WeakSven.exe
	WeakSven/WeakSven/obj/x86/Debug/WeakSven.pdb
	WeakSven/WeakSvenContent/obj/x86/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	XNA_GUI/bin/x86/Debug/XNA_GUI.dll
	XNA_GUI/bin/x86/Debug/XNA_GUI.pdb
	XNA_GUI/obj/x86/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	XNA_GUI/obj/x86/Debug/XNA_GUI.dll
	XNA_GUI/obj/x86/Debug/XNA_GUI.pdb