Bug 16728: Add MARC21 777 - Issued with entry to staff and OPAC detail pages

Bug 16728: Add MARC21 777 - Issued with entry to staff and OPAC detail pages

This adds the 777 - Issued with entry to the staff and OPAC detail pages.
It's built using the template for 773 with minor adjustments.

To test:
- Apply patch
- Catalog several 777 fields in one or more of your records
  - When using 1st indicator = 1, the note won't display
  - When using 2nd indicator empty, label will be "Issued with:"
  - When using 2nd indicator 8, the label will be drawn from $i if present
  - When $w and UseControlNumber pref is used, the link will be built using $w
  - In all other cases the title form $t will be used for the link
- Verify the display is correct

Examples for 777 can be found in the LOC MARC21 documentation:
http://www.loc.gov/marc/bibliographic/bd777.html

Note: Because the label depends on the 2nd indicator, the label is repeated for every
777 on a record.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>