BaseCmdLineTool now offers functionality to parse unknown arguments as well.

Derived tools don't have to run argparser manually anymore. They can just call run(get_unknowns=True).
added support for extraction of numYields, w, r values.
some matplotqueries refactoring. Added scatter plot type, nscanned/n plot type. Layout changes. Higher DPI.
some matplotqueries refactoring. Added scatter plot type, nscanned/n plot type. Layout changes. Higher DPI. fixes #58.
Merge branch 'feature-58-yaxis' into develop