Fix for user_paths.py errors

[JadenStrom]

Pull Request Checklist

• Code Follows PEP8 guidelines (explain any exceptions)
• New routines don't duplicate existing functionality
• Original authors of modified routines have been added as reviewers

This requests fixes issue #74

[emcangi]

I believe imports are required to be at the top of the file or it will throw an error

[planetarymike]

It needs to be here to avoid a circular import error, but this should be explicitly noted with a comment rather than implied.

[emcangi]

Ah, you can also import the download.py module as an alias, like:

# miscellaneous.py:

import maven_iuvs.download as dl
...
blah = dl.get_default_data_directory('l1a')

But this is not the most elegant since it imports the whole module. At any rate, I have something like this in echelle.py and echelle_graphics.py to avoid the same problem, but that's probably better addressed by eventually splitting up the quicklook vs. line fitting codes.

[emcangi]

To clarify, @JadenStrom please add either a comment to explain the positioning, or use the tactic I showed above. Make a new commit, push to origin, and it should show up here.