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/6be569f6d3ff38b39c3682dae7a97006

Change-Id: I0cb595efbcdd5fb16b6bd3c2445ca5c45c2457bf

openstack/mistral-specs