Add Response object to Beacon Specification

[saifGeL]

Context Beacon security:

To enable identification and communication of suspected attacks around the Beacon network or internally to an individual beacon.

Implement Response Object as defined in:

https://docs.google.com/document/d/1ufZFRKW1vhQVvms4scHYBRHIInm66YnfKiFkkTj0Ts8/edit

Embedding Attack object defined in:

https://docs.google.com/document/d/12KZfvOuCUj-gTa78nXxWR61dVehdd2Z4oZHQ_UyFR1I/edit

And adding a unique Beacon identifier.

https://docs.google.com/document/d/12KZfvOuCUj-gTa78nXxWR61dVehdd2Z4oZHQ_UyFR1I/edit is the approved version of the API.

[saifGeL]

Code being developed in security_dev branch 47185e1