can now load coloured locks and keys
tutorial sign base added
tutorial signs implemented
basic layout for tutorial level completed
updated layering in animation
updated the tutorial level with latest sprites
Merge remote-tracking branch 'origin/dan-dev'

Conflicts:
	MagnetBoy/MagnetBoy/MagnetBoy/Game1.cs
	MagnetBoy/MagnetBoy/MagnetBoyContent/MagnetBoyContent.contentproj