STORM-381 Replace broken jquery.tablesorter.min.js to latest

* from https://github.com/Mottie/tablesorter
* Version: 2.17.3
* Link: https://github.com/Mottie/tablesorter/raw/master/js/jquery.tablesorter.min.js
Merge branch 'master' of https://github.com/HeartSaVioR/incubator-storm into STORM-381

STORM-381: Replace broken jquery.tablesorter.min.js to latest
Updating LICENSE and CHANGELOG for STORM-381