Add git review configuration file and update README

Add more project related information to README.rst.
Added default .testr.conf file

Change-Id: If47bd1d72351abf4a272ecf0eab485f64620211d
Merge "Add git review configuration file and update README"
Initial code
Import from openstack.common (oslo-incubator fe06242669277203e87d4d3badf41bad4a4b5b9e)
Exploration of model work