Completed issues 5, 6, 7, 10, and 13

* Blue line is now lighter blue
* Orange line markers are now significantly brighter
* Selected stop is now marked with a reticle - successfully-fetched data turns the reticle white
* Errors in stop actions are marked by the reticle turning red
* Google Analytics tracking enabled
* Prediction pane now has a subtle style to differentiate different modes of transport better
Whoops, logging statements should be removed.