NEW FEATURE: Dropbox & YouTube file share can be cancelled
FLICKR: can send mp4 videos
BUGFIX: google plus supplies different scheme if authorisation callback is from safari, or installed app. Fixes #859 and #860
Merge branch 'master' into SHKUploadsViewController

* master:
  BUGFIX: google plus supplies different scheme if authorisation callback is from safari, or installed app. Fixes #859 and #860
LOCALIZATION: added activity indicator and uploads view tokens. Removed some duplicities