Add check for shapes.txt and no shapes_dist_traveled

This adds a warning message to the import process if
both a shapes.txt and no shapes_dist_traveled are available
since length for routes and modes will not be available.

Note: In developing this, no gtfs files with a shape_dist_traveled,
but no shapes.txt file were able to be found.
Merge branch 'develop' of github.com:WorldBank-Transport/open-transit-indicators into develop

Conflicts:
	python/django/datasources/tasks/gtfs.py
added logback logging
Fix navigation bar spacing gap
Add indicators is_latest_version filter
Update indicator-job to allow for multiple is_latest_versions

Needed in order to properly filter the indicator versions
based on version and city_name for the indicator map and data
pages.

The django.conf.settings.OTI_CITY_NAME should be temporary,
and will be replaced by a user-defined default for the
app's uploaded city name.

Updated the indicator-version endpoint to return all current valid
city_name/version combinations, which included uploaded comparision
indicators.

Set is_latest_version = True only on successful indicator csv import
Update django translations, remove default city_name
Add prototype for scenario mode
Remove _controller, which has been replaced by _indicators
Merge pull request #162 from WorldBank-Transport/feature/latest-version-filter

Add indicators is_latest_version filter
Invalidate last calculated indicators when new GTFS uploaded
Fix ErrorFactory initialization in celery shapefile upload.

Fixes #138.
Delete shapefiles for other cities on GTFS upload
Only invalidate indicators for city on upload
Move `city_name` from `Indicator` to `IndicatorJob`
Merge pull request #176 from flibbertigibbet/feature/delete-by-city

Feature/delete by city
Merge branch 'feature/logging' of github.com:echeipesh/open-transit-indicators into echeipesh-feature/logging
Merge branch 'echeipesh-feature/logging' into origin-develop

Conflicts:
	geotrellis/src/main/scala/GeoTrellisService.scala
Remove erroneous merge conflict
Remove blank line