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

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

* remotes/upstream/master: (29 commits)
  spam db
  fix tag icon size
  typo in css
  tagging missing from wallwall and a couple of themes, star missing from dispy
  Mail: New options for actions after importing mails.
  relative link redirects
  Avoid some notices
  Bugfix
  is not always defined; but if defined, then always of type integer
  1 Bugfix (missing $ character) and avoid some notices
  necessare fields not loaded from DB
  should probably be a->user['hidewall'] instead of profile['hidewall']
  "Vier-Theme" Some more design stuff.
  some revision to the German strings
  German strings
  Wrong variable name
  show experimental and unsupported theme status on theme admin page\18
  jumping divs with no scrolling
  imrpove contrast on darkzero blockquotes
  darkzero-NS theme
  ...

* master: