Cleanup angular code

  - Use a single leaflet map
  - Make Event factory to hold all app event strings
  - Fix map zoom extent
  - Fix indicator view css
  - Remove route_type=8 from oti-indicators.js cartocss
Remove unnecessary angular-bootstrap-affix
Update leaflet overlays rather than clear + redraw
Temporarily remove Real-Time settings page
Settings view map button goes to transit tab
Switch all OTI event strings to use OTIEvent namespace
Fix angular indicator test
Fix ng-csp missing stylesheet
Merge pull request #117 from WorldBank-Transport/feature/cleanup-angular

Feature/cleanup angular