Bug 1633 - Interface revisions for the staff client

Bug 1633 - Interface revisions for the staff client

This patch revises the image viewer page to match other
biblio detail pages: a toolbar, a sidebar menu, etc.

Additional data is now pulled by imageviewer.pl in order
to provide information necessary for the proper functioning
of the toolbar and menus: item counts, hold availability,
biblio view options.

Other changes have been made to match the changes in the
OPAC interface like styling of the images and no-javascript
compatibility

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Magnus Enger <magnus@enger.priv.no>
Patch failed to apply because of multiple Content-Type lines in the patch.
Corrected the same with this new patch.

http://bugs.koha-community.org/show_bug.cgi?id=6473