rephrase plot readme + pep8ed plot helper
more pep8 and some refactor. added required output_dir option
added space
Merge pull request #69 from steinwurf/jeppe-add-automated-plotting

Jeppe add automated plotting
sorting based on code classes defined in plot_helper
lines less than 80 chars
Merge pull request #70 from steinwurf/change-code-sorting-plot

sorting based on code classes defined in plot_helper
Merge branch 'master' into ready-for-new-fifi-version-2