Add windshaft cartocss style example
Add intermediate sql table for stops/routes join

Add sample query to populate it.
TODO: Populate this table via the gtfs-parser
Merge pull request #35 from WorldBank-Transport/feature/color-routes-by-mode

Add intermediate sql table for stops/routes join
Add routes to map, styled by route_type
Improve docs for oti-styling
Merge pull request #36 from WorldBank-Transport/feature/routes-on-map

Add routes to map, styled by route_type
Cleanup OTI map

  - Update basemaps to: Stamen/Stamen Lite, ESRI Topo, ESRI Satellite
  - Update routes color palette
  - Switch overlay order so stops layer draws above routes
Merge pull request #37 from WorldBank-Transport/feature/update-basemaps

Cleanup OTI map
Add UTFGrid interactivity.

This required forking the angular leaflet directive library and adding
UTFGrid interactivity to it.
Use azavea for of leaflet-angular-directive
Remove comments
Fix merge conflict with interactivity fields