Added support for push notifications

Added API functionality to the Parse Util to send and receive push
notifcations through a new broadcast recevier created called
DineOnRecevier.
Simplified Restaurant Application.  Made it more robust to changes and
added a simple screen to see current customers
Revert "Simplified Restaurant Application.  Made it more robust to changes and"

This reverts commit f3aa9888913576f7402e3bddd5989f9ef10d91f2.
Merge branch 'master' of https://github.com/blasv/DineOn into master_backup
Made slight modifications to Restaurant UI
Merge pull request #31 from espeo196/master

Slight change and repush to try and fix problem.