Add source  into README.rst
Add source  into README.rst

As other projects, it may be better to have
the source url information in REAME.rst.

Change-Id: I8367e8e3ad84a15fe4dd3ca7284c73e1a0ce90bd

os-cloud/os-ansible-deployment,BjoernT/openstack-ansible,jpmontez/os-ansible-deployment,yanyao/newton,cloudnull/os-ansible-deployment,jpmontez/openstack-ansible,BjoernT/os-ansible-deployment,Logan2211/openstack-ansible,open-switch/infra_openstack-ansible,major/os-ansible-deployment,yanyao/openstack-deployment-liberty,jpmontez/os-ansible-deployment,robb-romans/openstack-ansible,git-harry/os-ansible-deployment,open-switch/infra_openstack-ansible,yanyao/openstack-ansible,mrda/openstack-ansible,bunchc/openstack-ansible,mrda/openstack-ansible,jpmontez/openstack-ansible,BjoernT/openstack-ansible,yanyao/newton,major/os-ansible-deployment,weezer/openstack-ansible,jpmontez/os-ansible-deployment,major/openstack-ansible,openstack/openstack-ansible,git-harry/os-ansible-deployment,cfarquhar/openstack-ansible,weezer/openstack-ansible,BjoernT/os-ansible-deployment,yanyao/openstack-ansible,BjoernT/os-ansible-deployment,robb-romans/openstack-ansible,Logan2211/openstack-ansible,jpmontez/openstack-ansible,openstack/openstack-ansible,mancdaz/openstack-ansible,mancdaz/openstack-ansible,open-switch/infra_openstack-ansible,bunchc/openstack-ansible,mrda/openstack-ansible,cfarquhar/openstack-ansible,os-cloud/os-ansible-deployment,major/openstack-ansible,stackforge/os-ansible-deployment,yanyao/openstack-deployment-liberty,yanyao/openstack-deployment-liberty,git-harry/os-ansible-deployment,stackforge/os-ansible-deployment,cloudnull/os-ansible-deployment