Load bootstrap JavaScript for collapsible navigation
Remove left padding, use container on landing page
Resize map to full height on window resize
Minor CSS refactoring
Merge pull request #11 from taarifa/ui-tweaks

Some UI tweaks

* collapsible navigation
* map view resizes to full height on window resize

Fixes #10
Simplify upload_waterpoints script
Add Tanzanian district boundaries

* Add chloropleth (showing % functional) and satellite layers
* Assumes geojson district boundary file (not in repo) is served from
  static (probably not ideal).
* Takes a while to load all the data on first load.