Brain should speak Rayo natively

[bklang]

As we discussed at the last Convocation, I have some thoughts that the Brain should be a direct Rayo client. For much of the rich interactions we want to do, the Brain will need to be able to execute apps and have fine-grain control over the inputs and outputs to do so. THe job of Ears or Fingers should probably be limited to reading input and output in the native form (XMPP, SIP) and sending the messages to the brain (Rayo). Without this, we end up simply using AMQP as a carrier channel for the Rayo messages anyway.

This also means figuring out how input grammars apply to IM.

We still need AMQP, but mostly so we can easily plug in neurons.