fix display of success indicator
review: removed NSDictionary+Merge category
review: renamed QACellData to StackOverflowResponseData
review: StackOverflowAPI init method disabled, changed structure of initWithDelegate method
review: StackOverflowAPI init method disabled, changed structure of initWithDelegate method
review: empty "#pragma mark -" removed
review: StackOverflowAPI.m respondsToSelector check for delegate
review: fix cell height calculation
review: refactoring method name (UserSettings.m), removed constructor from StackOverflowResponseData