Ignore output for develop branch
Check SelectionView's copyPasteElement's parent before removing
Setting null should apply to all cells in current selection; include code for future opt-in

Missed adding local var for selection
EditableCellSelectionBinding did not clean up mappings, would leak

* KO's arrayFirst returns the correct item, but [].splice expects an index, not an object,
  so items were never being removed from the global.
Explicitly null out DOM elements, after removing them
Refactor creation of elements in SelectionView
Add information on styling editableCell
Release v2.1.0