Directory for output files
Choices are saved in the Output/ directory, with the id appended to the filename
A function to launch walkers, also, display now loads from output dir
More things are now arguments of launch_walker<>
Different distribution for direction
Seeding RNG is per process, not per walker
Do ten walkers
More extreme distribution for directions
Moved combine
Sort function
Get file from other dir
Save scalars to a file, destructor