haas cli now prints out argument names as part of the help.

You now get output like:

    ...
    user_create <username> <password> # comment
    ...

instead of:

    ...
    user_create # comment
    ...

The arguments are pulled from the functions themselves.
Merge remote-tracking branch 'moc/devel' into cli-argnames

Conflicts:
	haas/cli.py

In addition to fixing the conflicts, I updated some of the docstrings
for the new functions to better mesh with the help output.
Merge pull request #130 from zenhack/cli-argnames

haas cli now prints out argument names as part of the help.