Notes; also exported several dot-graph classes

darcs-hash:20060209194012-3cc5d-206a420d9cdfcd91bc5626f22c2c83ce355f24e9.gz

Export symbols for dot attributed graphs

darcs-hash:20060208212944-d0603-e5fac7d420941e9eef72e444da9d853c6183314b.gz

Added support for calling the dot executable, plus a bunch of dot attributes.

darcs-hash:20060208212629-d0603-4994de100350fc1fc64f7308c2873c020063d069.gz

rebuilding repo

darcs-hash:20060207183019-3cc5d-ec81d4a4640e47b51f94d1b886a61cfee666f622.gz