Show team and repo badges on README
Show team and repo badges on README

This patch adds the team's and repository's badges to the README file.
The motivation behind this is to communicate the project status and
features at first glance.

For more information about this effort, please read this email thread:

http://lists.openstack.org/pipermail/openstack-dev/2016-October/105562.html

To see an example of how this would look like check:

https://gist.github.com/2a0228f6c8b7f2468b198e7f41b9ab51

Change-Id: I1486dae328530c3ed6fc7114017c1c4be254de8b

openstack/dragonflow,openstack/dragonflow,openstack/dragonflow