Optimize up DataView aggregation.
Column option for 'focusable' needs a default value. Set to true, as that's the default behavior assumed by 'canCellBeActive'
No longer need to check if columns[cell].focusable is a boolean: since every column now is boolean by default, we simply return focusable at the end of the function. (The original 'return true;' is not needed because the default value here IS true.)
Merge pull request #538 from dariusk/master

Adding default focusable column option, plus minor optimization to canCellBeActive
Adding default value for selectable in column options, optimizing canCellBeSelected.
Merge pull request #540 from dariusk/master

Default selectable column option, minor optimization of canCellBeSelected
Added support for predefined group values to DataView.

New grouping info properties:
- predefinedValues - An array containing the grouping values for which
groups should be included even if they are empty.
- aggregateEmpty - Whether aggreggators should be run on empty groups.
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.
Update internal column cache when columns are reordered
Vendor Prefixes, Duplicate Properties

 - Added missing vendor specific prefixes
 - Removed a duplicate white-space property
Removed   -ms-text-overflow: ellipsis;
Merge pull request #558 from blowsie/patch-2

Vendor Prefixes, Duplicate Properties
ColumnPicker: Update reordering handle to interleave the hidden columns (in their last known position) with the grid's current order.