Mottie/tablesorter — pull request #553 by sylvain-hamel (2014-03-27 14:53:00+00:00)
Title: fix ie8 bug with cellIndex

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 https://github.com/Mottie/tablesorter/issues/551