Removed useless folder

Instead of a folder with code in its __init__.py, "juju" is now a proper
python file.
Fixed typoes

Also added a quick ownership tag for a FIXME (it wasn't immediately
obvious who "I" was refering to)
Removed magic numbers from step_info invocation

The method defined never-used defaults, and the only invocation passed
in different magic numbers. Now the default numbers are the ones that
are used.
Remove superfluous supers
Merge pull request #229 from sparkiegeek/master

Remove superfluous supers [r=chrisglass]
Moved the magic defaults to GUI

As requested.
Moved FIXME to relevant place.
Merge pull request #230 from chrisglass/random-fixes

Looks good, thanks!