Added dashboard integration's documentation
Added dashboard integration's documentation

Change-Id: I048191d1afa6f53759ba79c3b46a6048dc0d9921

FNST-OpenStack/cloudkitty,openstack/cloudkitty,stackforge/cloudkitty,FNST-OpenStack/cloudkitty,muraliselva10/cloudkitty,openstack/cloudkitty,muraliselva10/cloudkitty,stackforge/cloudkitty