Improved Checkbox editor ValueChanged behavior.

Checkbox editor was firing onCellChange event even when there was no change. This fixes that behavior and also returns a boolean on serialzeValue instead of the previous "checked" or undefined.
Remove usage on $.browser for jquery 1.9.0

jquery 1.9 has removed support for $.browser, use navigator.userAgent
instead
Merge pull request #543 from pzgz/jquery.1.9.0.fix

Remove usage on $.browser for jquery 1.9.0
incorporated suggestions by mleibman
Merge pull request #542 from wilcley/master

Checkbox editor ValueChanged event behavior fix
Optimize DataView flattenGroupedRows().
Add option to hide totals row.

Allow groups to exclude the subtotals from the rendered grid.

This is to allow using group formatters to display aggregate information in the group header rather than in a footer section (if desired).
I'm sure there are other uses as well, I just haven't been able to think of any.

Also added a new groupingInfoOption:
* displayTotalsRow (defaults to true).

We'll see if Github is smart enough to update the existing pull request.
Merge pull request #550 from svieira/patch-2

Add option to hide totals row.
Refactor Scrolling: scroll from any panel

Currently while hovering over any of the frozen row or column panels, the unfrozen pane does not scroll. I changed the mousewheel event to be bound to all the panels, and factored handleScroll so that it is called from handleMousewheel.

Here is a breakdown of the functionality changes:
1) scrolling using mousewheel or trackpad works while hovering over any panel
2) maxScrollX & maxScrollY are respected on the unfrozen panel so that the header and other dependent scrolling areas don't bounce around when fast scrolling
3) handleMousewheel now calls _handleScroll
4) onMousewheel event is removed, use onScroll event instead
5) mousewheeling depends on jquery.fn.mousewheel. if it is not loaded, slickGrid falls back to default behavior (mousewheeling only works while hovering over the unfrozen panel)
Adding headerRowSpacerR

Adding a separate headerRowSpacer for the right
Merge remote-tracking branch 'gcko/patch-2' into 2.0-frozenRowsAndColumns
Merge remote-tracking branch 'gcko/patch-3' into 2.0-frozenRowsAndColumns
Merge remote-tracking branch 'mleibman/master'
Ignore IDE files
Merge branch 'master' into 2.0-frozenRowsAndColumns