Add rtree tree to history for intersects
Tree intersect now works with changes
Use tree intersects instead of graph.intersects
Move intersection tree to iD.Tree
Tree handles entities with missing children
Merge remote-tracking branch 'systemed/master' into tree-intersects
Retry queued entities after rebase
Add tree test
Add general test for spatial tree
Fix rebasing and test
add history.intersects to context
Merge branch 'tree-intersects'

Conflicts:
	js/id/behavior/lasso.js