'render' not rendering frozen rows fix

Render() was not rendering the frozen rows when the grid had been scrolled and then the frozen options set
scrollcellintoview fix

ScrollCellIntoView was returning on occasions it shouldn't
Add pgUp pgDn functionality

Page Up and Page Down functionality were removed with the 'freeze' branch. Re-implemented
patch for event propigation in the headermenu plugin
Visible row count vs total row count in slick.pager.js
Add 'active' class to active row
Merge remote-tracking branch 'remotes/webda2l/patch-1' into k0stya-rowspan
Fix for paging and scrolling
Update slick.grid.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.
regenerated library files / ran build scripts
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
This commit: SHA-1: f3181205c951538e5122247754fd15f43dc90a3f * Fix for paging and scrolling
but without the huge whitespace change!
Update slick.grid.js
Merge remote-tracking branch 'remotes/joshq00/2.0-frozenRowsAndColumns' into joshq00-work

Conflicts:
	slick.grid.js