compat: import the module dagutil module in evolve
Discovery code is core have been rewritten to no longer depends on dagutil and
the module have been removed.
This break evolve's obsmarker discovery (older version of the discovery use the
same concept).. A quick work around is to import the dagutil module in evolve
and use that for now.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/