in multiselect mode, if rowid in the $t.p.selarrow, 'resetSelection' method should clean it
Changing roles to be more compatible with screen readers

Changed the roles of the header table, data table, and footer table to
be "presentation" and changed the parent element of these tables to have
role="grid".

Also changed all usages of the role "rowheader" to "row" because it was
being used incorrectly. See
http://www.w3.org/TR/wai-aria/roles#rowheader

These changes will provide better screen reader support. Tested with
JAWS screen reader.
Fix in jqPivot in case Array.prototype is used.
Merge pull request #627 from shipengyan/master

in multiselect mode, if rowid in the $t.p.selarrow, 'resetSelection' method should clean it
Formatting of the last fix
Now when dblclickrow or onighClick row are defined we can return true or false to control some behaviours on subgrids.
If nothing is returned the we have the old behaviour
Merge pull request #629 from zps938/master

Changing roles to be more compatible with screen readers