Renaming NBDial to PLDial
Adding and removing a bunch of stuff. Beginning to make use of UIDynamics.

- Removing NBAnimation and replacing it with UIDynamics. - Removing NBDialog — it was more of an experiment and didn't turn out to be a better interaction. 
- Renaming SonosInputCell to PLInputCell.
- Removing PLControlMenu, not necessary to have this abstracted into its own class.
Updating launch image and icon
Cleaning up the input adding view.