Update Russian translation
Fix translation
django-mptt 0.6.1 is compatible with the upcoming Django 1.7
Minor updates to installation.rst, updated LANGUAGES settings href, cleaned INSTALLED_APPS
Merge pull request #527 from pixlie/master

Minor updates to installation.rst, LANGUAGES settings href, cleaner INSTALLED_APPS
Merge pull request #526 from akadan47/master

Update Russian translation
Merge remote-tracking branch 'official/master' into next

* official/master:
  Minor updates to installation.rst, updated LANGUAGES settings href, cleaned INSTALLED_APPS
  Fix translation
  Update Russian translation