- HeaderCell now adds a data attribute containing the column name.- HeaderCell adds attributes to the column element if defined in the column model.\n-Header now refreshed row on column sort.\n- Header now raises an event once rendered.\n- Added tests for aforementioned changes.
Revert "- HeaderCell now adds a data attribute containing the column name.- HeaderCell adds attributes to the column element if defined in the column model.\n-Header now refreshed row on column sort.\n- Header now raises an event once rendered.\n- Added tests for aforementioned changes."

This reverts commit 8e2e40266ed7c12f5f511f25dc6b5b5f2921bda7.
- HeaderCell now adds a data attribute containing the column name.
- HeaderCell adds attributes to the column element if defined in the column model.
-Header now refreshed row on column sort.
- Header now raises an event once rendered.
- Added tests for aforementioned changes.