init: don't abort Mercurial on version mismatch
Evolve causes Mercurial to exit if there is a version mismatch, even
if no evolve command is invoked. This is a headache for people who
have to work with multiple versions of Mercurial. Instead, raise an
ImportError, which gives a warning but otherwise allows Mercurial to
run non-evolve commands.
syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$