NEW Feature: added SHKUploadsViewController
Merge branch 'master' into SHKUploadsViewController

* master:
  NEW FEATURE: Tap to dismiss on SHKActivityIndicator if upload progress is displayed. UploadProgressUserInfo enhanced too.
Merge branch 'master' into SHKUploadsViewController

* master:
  podspec 2.5.3 bump
  BUGFIX: even if useAppleShareUI was set to YES, ShareKit’s native form was sometimes presented.
NEW FEATURE: uploads view working live. Added SHKUploadInfo class, which encapsulates upload progress information.
BUGFIX: Fixed SHKActivityIndicator behaviour when dealing with multiple sharers at once. Only the latest sharer displays info on indicator, older ones continue to share silently.
NEW FEATURE: SHKActivityIndicator has circular progress view
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
BUGFIX: fixed typo in localization
NEW FEATURE: SHKEvernote can get user info
BUGFIX: implemented username on vkontakte
NEW FEATURE: SHKFoursquare can get user info
BUGFIX: proper username implementation in Plurk
NEW FEATURE: Hatena can get user info
BUGFIX: Hatena auth sometimes did not work, due to double URL encoding of OAuth verifier parameter.
BUGFIX: YouTube authorisation fixes (memory leak, proper closing of auth view even if item is not being shared (only authentication), username class method implementation)
NEW FEATURE: SHKAccountsViewController becomes a part of ShareKit’s UI (was in the demo app only)
BUGFIX: fixed wrong alert after successful evernote authentication