New branch for defense mode
Game A defense finalized by Yamandú and Fernando.
Delete house.cs
Merge branch 'GameADefense'

Conflicts:
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Enemies/Enemy.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Games/Game.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter.csproj
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter.csproj.Debug.cachefile
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Levels/Level.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Levels/LevelA.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Managers/GRMng.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Managers/XMLLvlMng.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Menus/Menu.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Ships/Ship.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/Sprites/Sprite.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_Shooter/SuperGame.cs
	IS_XNA_Shooter/IS_XNA_Shooter/IS_XNA_ShooterContent/IS_XNA_ShooterContent.contentproj
Problems fixed