Deploy an online tool

This issue will capture progress on making license-expression and boolean.py into online tools.

Transpiling tools that did not quite work:

RapydScript https://github.com/atsepkov/RapydScript
Lacks support for importing things (like, import __future__), its list of importable modules is here
Batavia https://github.com/pybee/batavia
The idea here is to compile python to its bytecode and then run it in a javascript vm. Because python bytecode changes from version to version, batavia currently supports 3.4.4 and possibly 3.5.x (their docs state many things). My problem was compiling those pythons on Archlinux and when I finally did a) their test suite did not quite pass and b) it chocked on import __future__.
PyPyJS https://github.com/pypyjs/pypyjs
The whole thing is complicated and I failed to make it work. Main demotivator: the website offers python 2.7.9 and there is a github issue that indicates python 3 support is stalling.

Transpiling tools that look promising:

Transcrypt https://github.com/qquick/Transcrypt and http://transcrypt.org
This is currently the only candidate that has a distinct transpiling step (you actually see the .js files as a result) that could be made to work. However, there are problems which are summarized on SO.
Brython https://github.com/brython-dev/brython
The most laid-back approach: just works, delivers results but sometimes the resulting boolean expressions come out wrong (runtime error).

Transpiling tools that look promising but not yet tried:

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