Prerequisites / build dependencies:
- gnu make
- md5sum
- bash
- wget
- gdal 1.9? (including gdal_edit.py in your path)
- libgdal-dev
- unzip
- sed
- gauche, gauche-c-wrapper
- grass
- internet connection (download is ~18GB)
- ~70GB free disk space
- ~24 hours processing time on my machine (using make -j4 and without
  download time)

Run:
make
and
make install
