More clarification/correction to hacking docs
More clarification/correction to hacking docs

Running pip install -e /path/to/git/clone from within the virtualenv
does not also install salt's additional required modules, as the
document suggests. I ran into this issue last week and so did a guy I
was helping troubleshoot in #salt.

Also, I clarified the bit about using --system-site-packages in your
virtualenv.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt