main: untangle results from len(paths)
main: untangle results from len(paths)

Before, we expected to retrieve exactly len(paths) items from the
results channel. We now close the channel when all jobs are done and use
a range loop over the results channel.

This decouples the printing of the results from the number of paths.

mgeisler/cram,mgeisler/cram,mgeisler/cram,mgeisler/cram