updating OKLeaderboard to new REST API calls
added pagination to leaderboards and support for user's top score
fixed pagination and updated nick view to show user's name
added customizability to OKLoginView text
remove old FB sdk and add new FacebookSDK v3.5
updated session handling code for FB
return NSError when user is not logged in on cloud storage calls
changed schemes to release, made scores unselectable
changed scores per page to 25
show player count in leaderboards
Merge branch 'development'