Bug 9459 [Revised] Use DataTables on hold ratios report page

Bug 9459 [Revised] Use DataTables on hold ratios report page

Replace the tablesorter plugin with the DataTables plugin on the
hold ratios report page.

To test, open the hold ratios report (Circulation -> Hold ratios).
Confirm that table sorting works correctly.

Revision adds correct pagination options and natural sort for 'items
needed' column.

Patch now depends on Bug 9431
(http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=9431) which
introduces the natural sort plugin.

Further revision corrects template path to datatables assets.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Comment: On top of Bug 9431. Sorting works. No errors.
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>