AUI-1589 -  extend aui-aria plugin with TableSortable class
AUI-1589 - use case - datatable demo
AUI-1589 - source formatting
AUI-1589 - improve captionVisibleChange logic
AUI-1589 - update HISTORY.md
AUI-1589 - add unit tests
AUI-1589 - Source formatting
AUI-1589 - source formatting