Major bugfix.

Do not use maximum evaluation points (eg. 100), but
the minimum points necessary to become part of the
evaluation (eg. 20).
Minor improvements.

* Stats has to begin with the minimum points configured and not always
  with 0.
* regex1 and regex2 are kept outside of the nested loop (performance).
* Print warning whenever grade is smaller 1 or greater than 5.
Remove trailing whitespace. Introduce NOTE.