rewrite: use cmdutil.logmessage instead of ad-hoc methods
The logic for handling the --message and --logfile options is already
in core hg in the cmdutil.logmessage function. This patch removes this
duplicate logic from Evolve and just calls the core function.
all: tutorials/tutorial.rst static/logo-evolve.ico
sphinx-build . ../html/
tutorials/tutorial.rst: tutorials/tutorial.t
python test2rst.py tutorials/
static/logo-evolve.ico: static/logo-evolve.svg
convert -resize 36x36 static/logo-evolve.svg static/logo-evolve.ico