Update project structure
Add Mantle via Cocoapods
Adjust format of dummy data
Refactor models to use Mantle
Remove bus array from Bus VC
Instantiate model
Init model with sub class of Bus model inside of Bus VC
Refactor display of label with message syntax
Update dummy JSON with long/lat in Boston
Place bus locations on map
Display pins within view - use iOS7 method showAnnotations: array