added UNFINISHED heart animation feature
fixed the bug on “swipe-deleting” in ResultsViewController.
added some text in the ResultView to be displayed (bpm and date, though still need to format the date).
RIGHT now, when the algorithm shows that:
TIME_TO_DETERMINE_BPM_FINAL_RESULT <= [[NSDate date] timeIntervalSinceDate:self.bpmFinalResultFirstTimeDetected]

the result is added to NSUserDefaults and the view is changed to the results tab controller. (maybe should think it over).

insertion, deletion and update of the resultsCollectionView works without bugs for now.