GPS interface map

[s-hliao]

We need an interface for tracking the robot on a live map (with the ability to add points, clear points from the map, rotate the map, and rotate the map to align with the robot's coordinate frame).

Consider maybe augmenting this map's waypoints with the ability to send them to the rover as an input for urc_navigation's GPS navigation (see necessary input for #81). This would require the ability to add points sequentially, then convert them into GPS coordinates and feed them to the rover in a message formatted as a list of GPS coordinates.