Installable python module

[ipmb]

This moves the files around to make a cloudmapper Python package that can be pip installed and uploaded to PyPI. The changes are:

• move all modules into a top-level namespace
• create a __main__.py so you can run python -m cloudmapper
• add a setup.py and MANIFEST.in to make it pip installable and create cloudmapper console script on install
• store generated files in a cloudmapper-report directory in the current working directory. web files are copied into this from the python package

Tests pass and the few commands I've run work, but I haven't tested all the commands manually yet. Auditor and docs need a pass too.

refs #595 #1

[0xdabbad00]

Oh wow, this is a big PR. Thank you @ipmb, and sorry I hadn't gotten to this until now. This seems like a good idea. It is such a big architectural change though that I'll need to test a bunch of things with it.