Serving mode

This work includes:

- pushing to the vendor map after login
- allowing the vendor to set their location by dragging and zooming the map
- allowing the vendor to go into "Serving Mode"
- super sweet animation to assure the vendor they are in Serving Mode :)
not a huge deal, but would be more efficient to have these outside of the class and remove the Colors class completely. Then you can just access them by `pink` or `wetAsphalt`. Then you don't instantiate a new Color class every time you want to get a static UIColor.