Support scatter courses as well as line courses

[jcundill]

For a Scatter Event - Typically put out 20 controls and have three “courses”: Long being the fastest finisher to get 16 controls; Medium being the fastest finisher to get 12 controls and short is the fastest to get 8 controls.

• So the “algorithm” could be to spread the controls such that it takes say 11 km to get 16, 7km to get 12; 4km to get 8 controls (or something like that).