debug: python not done. IS IT NECESSARY?
allow clean for single packages
debug: boost. My good old friend boost. Again took quite some time to figure this out.
debug: webp
debug: freetype
debug: proj4
debug: libxml2
debug: pixman. NO PDB gets generated. Maybe embedded???
debug: cairo
debug: sqlite
rename patch/expat.diff -> expat_.dif
debug: expat solutions patch for x64 debug
remove unnecessary backslash
debug: gdal
debug: libpq
debug: harfbuzz
check for error when deleting existing mapnik-sdk dir
test visual studio 14 custom image