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 #21 from rtab-IGP-2013/Jiawei

LevelManager added
Merge pull request #22 from rtab-IGP-2013/NEW-Misacorp

Level failed animations, walls and normal maps.
Fixed lose sounds on Level 1 and 2
fixed level2 fix
Updated textures for 1 and 2
added materials to walls
Better Physics Level 1
Fixed physics on level 2 and added super sweet fog
Merge pull request #23 from rtab-IGP-2013/textureupdate

Textureupdate added textures, fixed physics, cool fog.
CameraModel, Exit Signs and holy shit look at Dropbox
Unity save scene before commiting
x toggles cameras backwards
Update README.md
Block crusher is perfect
Block spawner and demoing that with block crusher in physicstestingfacility