Pushbullet:  Add Support for Link, Address, List, and File Pushes; Add delete push

- Changed the push_note parameters slightly.
- Added user friendly routines for additional push types
- Add the ability to delete pushes
Pushbullet: Disable Trace
Merge pull request #425 from krkeegan/pushbullet

Pushbullet:  Add Support for Link, Address, List, and File Pushes; Add delete push