Revise Keyboard home/end handling to resolve issues in FF/IE9 and IE6
Fix tree-related regression in Keyboard home/end logic
Emit dgrid-editor-[hide|show] event for shared editors
Only fire events for editOn editors and set cancelable to false
Merge pull request #425 from kfranqueiro/keyboard-end-fix

Keyboard end fix
Merge branch 'master' of git://github.com/bitpshr/dgrid into editor-hide-show
Add dgrid-editor-show/hide tests to other editor test pages
Document new editor events in CHANGES.md