Fix mesh schema title
Fix meshAttribute schema title
Replace pattern with enum
Replace pattern with enum
Replace pattern with enum
Replace pattern with enum
Replace pattern with enum
Replace pattern with enum
Merge pull request #212 from tfili/master

Added a cache for Animation Accessors
normalize quaternion
align rotations from decomposed matrices exported as axis-angle to take the shortest path
dump error when an file can't be created/written
Update README.md
first pass for https://github.com/KhronosGroup/glTF/issues/213
update OpenCOLLADA version
https://github.com/KhronosGroup/glTF/issues/189
https://github.com/KhronosGroup/glTF/issues/201
https://github.com/KhronosGroup/glTF/issues/182
https://github.com/KhronosGroup/glTF/issues/195
fix build