Copied files from version 0.1-2 for further development. pkg_unstable will serve as development area.
Added new version: 0.1-3, which has:
- feature of black and white display of treemaps
- improved figure title (now lists subpopulation)
- reduced memory usage (thanks to Penguinsula)
moved unstable version 0.1-3 to stable (into pkg directory)