New filtering system
Multiple selection values
Show selection boxes for choices
Select category / choices works :)
Handle default values
Handle filter source _=null => _=count(sources)
Automatic constant value for filters
FIlter mouse/selection just like the real image
Don't crash on missing selection sort columns
Don't crash on missing choices sort columns
Support filter/categories in cluster animation
Removed the old startTime/endTime uniforms
Merge branch 'master' into filters

Conflicts:
	js/app/Visualization/Animation/Animation.js
	js/app/Visualization/Animation/ClusterAnimation-vertex.glsl