Mottie/tablesorter — pull request #554 by sylvain-hamel (2014-03-27 17:02:57+00:00)
Title: Replace all references to cell.cellIndex by $(cell).index() to prevent error

"Unexpected call to method or property access."
see: http://stackoverflow.com/questions/14201168/table-cell-index-problems-in-ie8
closes #551