Feature #2669 - Added cell phone menu support and ability to toggle ringer.
Feature #2669 : Added ability to attach and detatch arbitrary events to cell phone menu options.
Feature #2669  - Added addTextMessage() + addTextMessage event and addPhoneCall() + addPhoneCall event for adding phone calls and text messages to the cell phone. See Wiki for documentation.

Also added initializeCellPhone() function to reset the phone's state during loading.