fixes #183, fix missing file extension
Merge branch 'master' of gh:Catrobat/Catty

* 'master' of gh:Catrobat/Catty: (23 commits)
  conflicts solved
  only stop music in SceneViewController
  fixes #198
  fixes #195
  small refactoring
  fixes #194
  fixes #193
  fixes #170
  changed NSLog to NSDebug
  fixes#182
  fixes #176
  fixes #185, improves #154
  dismiss keyboard when touching outside
  reachability if WIFI needs e.g. VPN
  loading indicator stops when download canceled
  fixes critical bug
  fixes #171
  more accurate apporach at loudness
  loundess in percent
  indicator stops loading in most downloaded tab
  ...
Merge pull request #201 from Catrobat/issue#183

fixes #138
Merge branch 'master' into dev_marc