WIP - Restructure the repository

[jpic]

• add tox for easier reproduction of travis builds
• add idempotence to install_client_deps.sh if CI=1
• mov modules into src/
• update setup.py to install everything as separate modules
• merge django-representatives
• merge django-representatives-votes
• update documentation
• add docs and qa tox jobs

TODO:

fix tests

[jpic]

This pretty much works ... except tests, i think the test order is a big deal here.