remove dead code
requestAnimationFrame does not help performance; custom written solution with moving average works better; fix load
pan bg grabbing not flakey on slight mouse move anymore
cxtmenu working well
edgehandles bugfix
refs #277 Calculation for intersecting ellipses with the selection box now properly detects non-intersections when the corner of the selection box is outside the ellipse
fixes #277 Calculations for the selection box now properly checks if nodes with polygon shapes collides with the box
greatly improve performance on cxtmenu (significant improvement on touch)
fix #244
fix #270 by using proper zordering algorithm for drawing AND hittesting
fix dragging outside container
fix #271
remove dead ctrl pt code
instead of applying all styles in sequence all the time, just apply the delta (overwrite/rollback); gives large improvement to performance
cxtmenu performance greatly improved on touch; minor bugfixes
remove active bg on pinch to zoom
vastly improve overall rendering performance by removing unnecessary context state changes
fix animation and style bugs
mappings always updated
collections maintain order