Add a -sample-rate argument so you can sample from your relative difficulties file without having to run awk yourself. Fixes #240.
Add a -sample-rate argument so you can sample from your relative difficulties file without having to run awk yourself. Fixes #240.

Merge branch 'sample-rate'

* sample-rate:
  Print out how many lines in our relativedifficulties file.
  Implemented numLinesInFile. Not tested.
  Fixed it so we actually craete and use a properly sampled file
  Small tweak to the sampled filed name
  Fixed it so it runs, but the file isn't actually sampled.
  Small tweak to error message for awk. Still doesn't work.
  Wire up the sample rate with -sample-rate. Doesn't work.
  IMplemented sampledRelativeDifficulties. Not tested.

jkomoros/sudoku,jkomoros/sudoku,jkomoros/sudoku