[Netstack] quantum LICENSE file

Hi folks, The Quantum directory currently does not contain a LICENSE file that is included when someone grabs the code using bzr. Including one is a very good idea, for lots of reasons. I would advocate for adding a LICENSE file to the root of the code base that includes the standard apache 2.0

Re: [Netstack] "network-refactoring-l2" branch, and Quantum

> Long term, I think AMQP could be used more widely, but I'd prefer Speaking of the long run, don't forget about Burrow (which may eventually replace AMQP in some cases): http://burrow.openstack.org/introduction.html As others have suggested, I think a focus on the REST interfaces for communica