Check that citydata exists for aggregation before displaying
Allow ordering of indicators by value
Allow paginate Indicators by page_size param
Add legend for indicator map page

Update oti-legend directive with style param, allows
    either 'flat' or 'stacked' style

Dynamically create legend max/min values from indicator values

Add OTIMapStyleService:
    Has stubs for future functionality, like custom legends
    per indicator type

TODO: Send CartoCSS style for each indicator to windshaft from angular
      BLOCKED on scala geom fix
Add basic auth to rest_framework
Merge pull request #314 from WorldBank-Transport/feature/auto-load-canned-data

Add basic auth to rest_framework
Merge pull request #311 from WorldBank-Transport/feature/indicator-legend

Feature/indicator legend
Add a dict to keep track of parameter requirements
Add generic means for turning on or off some indicators
Add error handling for missing data and extra logging for celery
Fix extra indentation
Convert Json to Scala val naming convention
Use bool instead of if/then