[warzone2100] (3 commits) ...Update to 3.1 beta 11

[jsynacek]

Summary of changes:

  022bab0... Update to 3.1 beta6 (*)
  f0de298... Merge branch 'master' into f17
  fee049f... Update to 3.1 beta 11

(*) This commit already existed in another branch; no separate mail sent