fix problem with dragging the map on tablets
add drag-and-drop function
move things around inside drag-and-drop
fixed frame reporting
added a move test
Merge branch 'performance'
merge master
use drag-and-drop.js
change method names added to map-model
fix for stopping edit with a click
pulled out perftests into a separate file, added a test for selection
drawing stage only once for node activation - 50x responsiveness improvement for large maps
reselect a non-activated selected node
reselect a non-activated selected node
avoid setting up a shadow if same as before - 50% increase in responsiveness for batch style operations