Log Message:
Update to 2.8.1

Changelog:

GIMP Help 2 release 2.8.1
=========================

- New (incomplete) translations: Brazilian Portuguese, Danish, Catalan
- Online documentation (http://docs.gimp.org) now provides a language
  menu which allows users to switch to other translations of the same
  document if available (#168256)
- Bugfixes:

    * #168256 - Help pages should have links to corresponding pages in other language
    * #676683 - Docs use the term "dpi", GIMP UI uses "ppi"
    * #679173 - Grammatical error in Help Browser: "have there own preset \ 
system"
    * #680243 - Export File shortcut error in Gimp Manual
    * #711318 - help pages should have a link to Bugzilla