Support for "level failed" animations

GameManager can now call for a "level failed" animation to play.
Merge remote-tracking branch 'origin/rebased' into NEW-Misacorp
Wall textures, physics and normal maps

- Added wall physics material.
- Added 4 different wall textures
- Added normal maps to existing textures
- Created new normalmapped materials under texture/Materials. Apply them
to your level objects!
Merge pull request #22 from rtab-IGP-2013/NEW-Misacorp

Level failed animations, walls and normal maps.