Make wazimap pip installable

[longhotsummer]

What if wazimap was pip installable? It would make it much simpler to re-use and for downstream to receive updates and improvements (eg. Kenya).

This should all be done while requiring minimal intervention for the simple use case -- ie. make good default choices.

We'd have to make changes to:

• [x] support settings for things which are currently hard-coded
• [x] site name, URL
• [x] topojson vs mapit
• [x] specify what tables exist and how data is loaded
• [x] setup the profile page
• [x] setup custom URLs
• [x] geo hierarchy
• [x] flat geo model
• [x] map downloads
• [ ] django-pipeline
• [x] documentation
• [x] create a new repo for this package
• [x] embeds

[longhotsummer]

We might want to make it possible to specify profile pages declaratively, rather than the current procedural method of programming the entire page and having the correct python code to match it.

[longhotsummer]

This is all happening here: https://github.com/Code4SA/censusreporter/tree/wazimap-pip

[longhotsummer]

This is now done! http://github.com/Code4SA/wazimap