some cleanup and refactoring in shader
multiple bones
Merge branch 'daniel' of https://github.com/memo/VolumeRunner into testmerge

Conflicts:
	VolumeRunnerApp/bin/data/ofxMSAControlFreak/MSAControlFreak/default.xml
	VolumeRunnerApp/bin/data/shaders/raytrace_test.frag
	VolumeRunnerApp/src/ofApp.cpp
Merge branch 'daniel' of https://github.com/memo/VolumeRunner into testmerge
fix some merge issues
skeleton debug view
mega hack to ignore NAN from animation