AUI-1470 Update HISTORY.md to reflect source code changes
AUI-1470 - Source formatting
AUI-1581 - AUI Carousel demo images don't appear in Firefox
AUI-1581 - Source formatting
AUI-1558 - Create unit test for padNumber
AUI-1558 - Source formatting
AUI-1459 - Source format HISTORY.md
AUI-1578 - AUI Carousel can be temporarily hidden if navigated between slides during transition
AUI-1485 - Source formatting HISTORY.md
AUI-1589 -  extend aui-aria plugin with TableSortable class
AUI-1589 - use case - datatable demo