Updates to the Google API require registered apps to be designated as an iOS app to work correctly.
Completions on SHKFormController & SHKRequest
SUBMODULE UPDATE: Google-api-objectivec
Changed callback for Google+
BUGFIX: changed new google+ callback url to demo app delegate
Merge branch 'master' into refactoring/ARC-SoloPinboardTest

# By Vilém Kurz (3) and Jacob Dunn (1)
* master:
  BUGFIX: changed new google+ callback url to demo app delegate
  Changed callback for Google+
  SUBMODULE UPDATE: Google-api-objectivec
  Updates to the Google API require registered apps to be designated as an iOS app to work correctly.
REFACTORING: SHKPinboard matched with block based SHKFormController and SHKRequest
BUGFIX: break block retain cycle caused by SHKLog using self
REFACTORING: Delicious, Diigo, Kippt sharers ARC + blocks
REFACTORING: SHKFormOptionController cleaned
REFACTORING: Instapaper uses blocks
REFACTORING: Foursquare uses blocks
BUGFIX: SHKRequest better manages inheritance in factory method