Merge with v2.0
MVC interface for tracks
Fixes for interface/MVC
Added threshold support via { 100: false } style config
Fixed some resize issues
Fix function extending
Make resizer work
Make legend work
Correct position/size of loading div in makeFirstImage
Tidy
Updated trackControls plugin
Made legend unsortable
Don't make a threshold message if threshold is infinity
lint
Added prop function on track. Model, view and controller can call it with this.prop
Cleanup