Bug 8204: Add user friendly authority view to OPAC

Bug 8204: Add user friendly authority view to OPAC

Up until now, the only authority view in the OPAC was a
rather-unfriendly expanded MARC view. This patch adds a user-friendly
view similar to the biblio details view.

Specific features to be aware of:
* Right-to-left text in the MARC21 880 field will show up in the
  appropriate location with the appropriate alignment and wrapping
* There is very little CSS styling. Any suggestions for how to make
  the display more attractive would be gratefully received.

To test:
1) Do a search for an authority in the OPAC.
2) Choose an authority record to view.
3) Observe that the view is more user-friendly and polished.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works very nicely now. The old view is still available, but the
user is presented with a nicer non-MARC view first.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>