Visible row count vs total row count in slick.pager.js
#794 - Add an event that exposes the internal selected row ids.

Make DataView. syncGridSelection() return an event that notifies when
an internal list of selected row ids changes.
Fix #791 - Cancel the current edit on updateRowCount().
Fixed a missing unit in CSS.
Added an 'addNewRowCssClass' option.
Merge pull request #795 from styfle/master

Visible row count vs total row count in slick.pager.js
Merge remote-tracking branch 'remotes/mleibman-original/master' into k0stya-rowspan

Conflicts:
	slick.grid.js
Fix latest merge: remove duplicate 'Show N items' message construction