SUBMODULE UPDATE: Facebook-ios-sdk
REFACTORING: shareKit core library moved to ARC
REFACTORING: removed unnecessary curOptionController nilling - now it is weak property, it nils itself automatically on dealloc
Merge branch 'master' into refactoring/ARC
BUGFIX: configurator methods must return objects, otherwise crash. BOOL methods refactored to return NSNumber
REFACTORING: get rid of performSelector ARC warnings
Completions on SHKFormController & SHKRequest
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
REFACTORING: Foursquare uses ARC
REFACTORING: VKontakte uses blocks & ARC
REFACTORING: SHK ARC Final cleanup
REFACTORING: Buffer & Copy sharers moved to ARC
REFACTORING: Evernote sharer on ARC
BUGFIX: SHKRequest accessor uses ivar directly
REFACTORING: more sharers on ARC