Add instructions to tackerclient
Add instructions to tackerclient

Add attach/detach interface instructions to tackerclient.

Change-Id: I00235e2150fd1d44111ceb2a4a9a7bba2b5d82ac

trozet/python-tackerclient,stackforge/python-tackerclient,openstack/python-tackerclient,trozet/python-tackerclient,stackforge/python-tackerclient,openstack/python-tackerclient