Merged the first two MPI labs bc they are short
And took it out of tex doc
Changed the directories
Changed rendering of waveforms to png to avoid lagging PDF readers.
Merge pull request #633 from insertinterestingnamehere/plotfix

Changed rendering of waveforms to png to avoid lagging PDF readers.
Merge pull request #612 from AZaitzeff/MPI

I am merging this. But these comments from Ryan have to be taken care of sometime