Document postMCA method
Add weight field to MCA database records
Rename ops and pass MCA data to computeHeatmap
Rename/Introduce new var (computeHeatmap)
Include MCA in heatmap
Cache computeHeatmap args for call in aggregate cb
Deprecate limit/nolikes args for updateHeatmap
Add updateHeatmapCached method
Don't include empty playbacks in aggregate
Merge branch 'master' into public_demo_20130402
Add heat-map settings controls