Fixed two problems. Fix #1 was to make printpf.py python 2 and python 3 compatible. Fix #2 is to make runpf.py match documentation - i.e. output to a file does NOT overwrite, it is appended.
Merge pull request #14 from charlie0389/py3printpf

Fixed two problems. Fix #1 was to make printpf.py python 2 and python 3 ...