Merge branch 'master', remote-tracking branch 'remotes/upstream/master'

* remotes/upstream/master:
  fix text-editor in theme
  german strings as of 28th Feb from transilex
  small fix in style.css
  fix star/unstar
  fixes in wall_item.tpl and style.css in theme diabook
  fix in wall_item.tpl new icon link.png
  add diabook to default themes
  fixed broken tags and notifications in theme

* master: