reload table when data arrives
use fetchIfNeededInBackgroundWithBlock for lazy load of user

- the user isn't loaded until the audioClip is displayed in the table
  cell
add reloadData for table as soon as audioClips arrive

- this means we can immediately display the title and createdAt
  attributes
Merge pull request #30 from maml/associate-user-with-audioClip

Associate user with audio clip
human readable timestamp display
Merge pull request #31 from tunam3lt/master

added parse login view controller
remove custom controllers cuz we don't need them yet
remove header reference of custom login controller