Load map configuration from XML file.
Add basic XML map file.
Add gitignore for Visual Studio.
Merge branch 'master' of https://github.com/Chavjoh/PortalTowerDefense

Conflicts:
	Source/PortalRush/GameEngine/GameManager.cs
	Source/PortalRush/PortalRush.v12.suo
	Source/PortalRush/bin/Debug/PortalRush.exe
	Source/PortalRush/bin/Debug/PortalRush.pdb
	Source/PortalRush/obj/Debug/PortalRush.exe
	Source/PortalRush/obj/Debug/PortalRush.pdb