Closes #374: Use unitless constant for transit network density
Make Indicator controls actually update tiles
Remove duplicate stops coverage indicator
Attach buffer geometries to certain indicators
Render buffers in Windshaft.
Remove giant post-refactor comment block
Fix double import problem after Geotrellis update.
Merge pull request #410 from WorldBank-Transport/feature/buffers-on-map

Buffers back on map
Merge pull request #384 from WorldBank-Transport/feature/update-line-density-format

Closes #374: Use unitless constant for transit network density
Add mode filter for gtfs_shapes and gtfs_stops to windshaft

Fix SQL injection vulnerability

Add modes param to map and move map controls to bottom left
Add mode selector

Add modes to windshaft indicator SQL

Add mode filtering functionality to indicators map
Make mode selection stick between Transit tab and Indicators tab
Small UTFGrid fix
Changed event strings to properties