changed 'retain' properties to 'strong' because ARC
updated Post model with vote fetching methods
updated questions list view controller with correct vote count display
Merge branch 'develop' into feature/question_list_vote_up_and_down
voting now works, but a user can cast multiple up or down votes, which is undesirable
set up cloud code
setup private data plist
cloude code work in progress. not yet working
Merge branch 'develop' into feature/question_list_vote_up_and_down

Conflicts:
	Delphi.xcodeproj/project.pbxproj
Merge branch 'feature/question_list_vote_up_and_down' into develop