refactors air quality api utility to include air quality param type. Adds this to the models and the model save function.
Adds air quality param to admin view
adds model migration to repo
updates details template to incorporate fine particles and ozone for air quality param
updates to index and detail template to show air quality parameter description. Adds ozone description to the utilities function
adjusts model save function to adjust for location information present, but no air quality rating
Merge pull request #177 from SCPR/develop

Re-factor and bug fix for AirNow API manager