* subversion/po/nb.po: More strings translated.
* subversion/po/nb.po: More strings translated.

Also added Plural-Forms line in the header.

4345f822-a2e3-11de-8f95-00248cd5cf1e

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion