functory: authors, license, homepage
ocamlgraph: homepage
core 109.18.00-rc1
add missing ocaml-version constraint to core

Seems to have been dropped between 109.15 and 109.17
added jenga.install
core 109.18.00
Add the right constraints for biocaml (see #623)
Update archimedes 0.4.15
Merge pull request #636 from backtracking/master

updated information for functory and ocamlgraph