Bug 18791: Add the ability for librarians to easily copy, download or print DataTable...

Bug 18791: Add the ability for librarians to easily copy, download or print DataTables based tables in Koha

There are many tables in Koha where it would be useful
for librarians to easily copy, download or print the table
for various purposes. These functions are available via
DataTables button plugins.

Test Plan:
1) Clear your browser cache ( just in case )
2) Apply this patch
3) Browse to boraccount.pl ( or another page using DataTabes )
4) Note the new Excel, CSV, Copy and Print buttons
5) Test each button to ensure they work

Signed-off-by: Claire Gravely <claire.gravely@bsz-bw.de>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>