add obsolete parents wrapper to the 'parents' command
although the command itself cannot *cause* obsolete changesets, the
information is rather relevant to the state of the parents
all: tutorial static/logo-evolve.ico
sphinx-build . ../html/
tutorial:
python test2rst.py tutorials/
static/logo-evolve.ico: static/logo-evolve.svg
convert -resize 36x36 static/logo-evolve.svg static/logo-evolve.ico