Update weblinks
Update weblinks

The targets for _OpenStack CLI Guide  and _OpenStack API documentation
no longer point at helpful information.  Update them to something more helpful.

Change-Id: I1ecf796650c15864e9f848f16e96ee58db97ddcc

guptaankita/python-novaclient,mat128/python-novaclient,takeshineshiro/python-novaclient,guptaankita/python-novaclient,takeshineshiro/python-novaclient,mat128/python-novaclient