Added Service Area series to AOI charts.

Renamed "selection" layer id to "aoi".

Language chart outlines are color coded at AOI level.

Bugfix: Age and Veteran chart data were not being created correctly when being created from localStorage JSON strings.

Converted Pie charts to ClusteredColumn charts.

Set stroke colors on charts when at AOI level.
Merge branch 'master' into add-gtfs
Updated GTFS-Service submodule