global: jquery.tablesorter into bundles

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
global: MathJax into bundles

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
global: datatables* into bundles

* Removes the bower.json and grunt as well.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>