Update pebble-js-app.js - Battery Status

Added code to the Pebble app that will allow you to view the current Android battery level of the CGM Uploader.  And display it on the Watchface App.
Wups...I apologize for not creating logic for non-updated code.  Have not used github in quite awhile.  Thank you very much for the catch.  I like the 2nd suggestion as well.