matplotlib: Missing various dependencies, which now have their own cmake files ( six, pytz, python-dateutil, pyparsing, tornado ). These have now been included and added as dependencies. Did not add PyCXX or LibAgg as they are bundled with Matplotlib and we would rather use the version they have tested against as we don't use them elsewhere yet. Updated the comments to reflect this information. Should consider updating to a more recent version of Matplotlib, but that was not done here.