Fixing problems with new download scheme.

Change-Id: Ifec91b515640917ea8934a3230362f455648bd13
Changing co-* to cobalt-*.

Change-Id: I87f8059310cb9549ac19878f13f8450c8eeecd92
Merge "Changing co-* to cobalt-*."
Add nova cobalt-caps to print capabilities with some basic explanations

Change-Id: Ibc6cac82215a531cec6bb697a23c3adcd4704b50
Use the user's actual default ssh-key for the agent install.

Instead of assuming the user's default ssh key would be
~/.ssh/id_rsa, use the value of None and allow the ssh command to
correctly determine the default value.

Change-Id: If8ef1733d9c3b368d6d9a17598adee5c8d940929
OS-217 removing the use of RPMforge and using EPEL instead
The epel setup code was taken from work Andres had done for nested setup

Change-Id: Ia825ad389f050868f137f58b31ee585b494b4376