Rewrites and small typo fixes in the Norwegian nb.po file.
Rewrites and small typo fixes in the Norwegian nb.po file.

* subversion/po/nb.po
  Lots of "\"\"" and some "''" replaced with "«»". Some small typo 
  fixes. Removed obsolete messages from end of file.

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