add a hook so that selection-change event listener can be setup
in markup
Remove a11yclick's synthetic event types (ex: on(node, a11yclick.press, ...))

Just keep the part to emit synthetic "click" events for SPACE/ENTER
on a node whose ancestor has a d-keyboard-click attribute.

Fixes #192.
Update delite/Store user documentation

postProcessStore method does not exist anymore.
preProcessStore has been renamed processQueryResult.