FIX - #12 IAPHelper.m line 76 - only perform completionHandler if skProducts exists.
TWEAK - TrackCacher now logs the track title along with the sizeBytes
FIX - play button now doesn't work unless there is a track in the player
DATA - adds track size to Glenda and Travis' tracks
FIX - background color of SettingsVC after color change for iOS 6, now the background stays white
TWEAK - text colors on trackVC
FIX - does not display 'Tags: ' string if there are no tags
IMAGES - tweaking various images