Displaying distances and distance calculations

[markahon]

Do these, if user location is set:

Calculations

1. calculate direct (i.e. approximate) distance using Google Maps Geometry library -> computeDistanceBetween() DONE
2. For highest ranked (i.e. cheapest / nearest) n stations, get more accurate driving distance using Google Maps Directions API

Storing results

1. Store type of distance data (i.e. direct "as crow flies" or driving distance), use 1 decimal (=100m) accuracy DONE
2. Store to user data at what location distances where last calculated. Since we follow user location changes --> re-calculate distances if user location has changed from that e.g. by 50 meters (to avoid unnecessary calculations)

Displaying distances

1. Display distance in list view and in station details views DONE
2. Display appropriate indicator for distance type (e.g. car-icon for driving distance, aeroplane/bird-icon? for direct distance) DONE