add register/deregister unsolicited notifications commands.  Add to callback method to announce received unsolicited response.
add register/deregister unsolicited notifications commands.  Add to callback method to announce received unsolicited response.
add register/deregister unsolicited notifications commands.  Add to callback method to announce received unsolicited response.
add register/deregister unsolicited notifications commands.  Add to callback method to announce received unsolicited response.
Merge pull request #160 from vronchetti/Unsolicited

Unsolicited