Automatically deploy to pypi on tag

[m-kuhn]

Allows using

pip install pum

Biggest change is moving the code into a subfolder, this requires updates to adjust dependants (qwat)

[m-kuhn]

Thanks for the review. Yes, in that case I'd say better use pip install than git submodule in qwat/travis, right?

[marioba]

Yes, I also think it's better with pip. But if we continue with git submodule, at least we need to change the path of pum.py into qwat/travis to pum/pum/pum :)

[m-kuhn]

If all goes well now, you can do:

sudo pip install pum
pum --help