Update VE core submodule to master (1fd23db)

New changes:
3e2537f Split getSelectionRect into bounding and inline
b73d010 Kill rangy (almost)
38207f4 Kill rangy: Vol. 2
b392d88 Rangy's dead honey, rangy's dead

Local changes:
* Remove references to rangy

Change-Id: I900eb3e36a564a526c01a5e00f8ea31a1ac9c0a3