Fix #421 - Don't close the header menu on scrollbar click
Fix #398 - Add a "defaultSortAsc" column option.
Fix #385 - Avoid a division by 0 in handleScroll.
Fix #450 - Column reordering broken if grid initialized with empty columns array.
Add an option to cancel edit on drag in RowMoveManager and update the example.
Bugfix init Jquery UI Sortable Widget +1.9
Delete .DS_Store, create README
Merge pull request #482 from oortcloud/master

Create README, delete .DS_Store and .gitignore it
Stop the grid from trapping keyboard focus.
Fix keyboard focus getting trapped when cell has tabbable elements.

Added another focus sink just after the grid content and set focus
depending on the direction of keyboard navigation.
Merge pull request #462 from francoispluchino/master

[BUG] Jquery UI Sortable Widget +1.9 init bugfix
Don't initialize Sortable just for destroying

The `:ui-sortable` pseudo-selector filters out the element if it hasn't been initialized as a Sortable.
Merge pull request #494 from atesgoral/master

Improve jQuery UI Sortable fix
Fix #498 - Selections are not always maintained when filtering (Example 4).
Fix #496 - Improve the example to demonstrate proper use.
Add 'sortable' CSS class to sortable headers (#514).
Pass the right row to 'asyncPostRender' function (#505).
Added distance to prevent unintended reordering

Added a small distance delay on the sortable to prevent users from unintended
triggering of the reordering. (Happens all the time i'm using slickgrid).
i.e. the users tries to sort the column but fails since his mouse was still
on the move a little bit and 1px is enough to trigger reordeing here.
Please try, it still feels very responsive.
Replace 'hover' deprecated pseudo-event

'hover' pseudo-event has been deprecated in jQuery 1.9.0,
use of 'mouseenter' and 'mouseleave' instead.
Merge pull request #519 from loris/patch-1

Replace 'hover' deprecated pseudo-event