Advertise application prefix

[yoursunny]

Provide an API for applications to advertise a prefix from the application, so that the network starts forwarding Interests matching this prefix toward the application.

In the request, the application should provide a face identifier (from #5 response) and a Prefix Announcement object.

In the response, the agent should return an acknowledgement, and any necessary parameters to withdraw this prefix announcement.

[yoursunny]

This is an illustration of this and related features.