Add prototype pie charts for route/mode aggregations

TODO: Test system-wide data
TODO: Alternate chart types
TODO: Per-chart config?
TODO: Display route type name instead of int
Tweaks to enable multiple city display
Fix units and aggregation of length calculator

The units were in meters when kilometers were desired.
Also, the the mode aggregation was using an average when
it should have been using a sum.

Note: these number are now in the ballpark with reality,
but still don't look perfect. SEPTA rail is showing 551
kilometers, where it should be somewhere around 450.
Adding an issue to address this.
Merge pull request #152 from WorldBank-Transport/feature/fix-length-units

Fix units and aggregation of length calculator
Add mode/system geom string generation;Refactor
Manual merge on tests
Merge pull request #146 from WorldBank-Transport/feature/prototype-indicator-charts

Feature/prototype indicator charts
Replace lazy with eager map method
Set up monit to monitor app services

The monit dashboard is available at port 2812, or 2067 on Vagrant. It
currently only attempts to restart failed services; it doesn't send
alerts based on CPU usage, disk space, etc because it wasn't clear how
that would work for transit agencies.
Merge pull request #159 from WorldBank-Transport/feature/eagermap

Replace lazy with eager map method
Don't install Monit on Travis

It's not necessary and could potentially lead to strange build failures
if Monit relaunches services not intended to be launched on Travis.
Merge pull request #155 from WorldBank-Transport/feature/monit

Set up monit to monitor app services
Replace cityname in indicator id with loop index

Cannot use cityname as those can have spaces/punctuation/etc
that tanks the id selector
Default Indicator.city_name to a string value

...so that we get a display name in the UI.

TODO: Attach a user-customized city_name to the
GTFSFeed object.
Add bulk indicator delete, filtered on fields
Complete Add/Remove City Modal

TODO: Copy translations
TODO: Scenarios

Updates angular translation files
Add tests for django indicators DELETE endpoints

Cleanup comments/logging
Merge pull request #157 from WorldBank-Transport/feature/city-modal

Feature/city modal
Remove unused OSM/OpenLayers files
Add packer AMI generation ability