scalaz/scalaz — pull request #203 by pthariensflame (2012-11-29 18:56:59+00:00)
Title: Lens Families (again)

I'm opening this pull request a second time because of problems with the first one (#178) (namely, that it had too many merge commits and had some small conceptual issues as well). The old version is now defunct. :) I'm still waiting for more replies on [the mailing list](https://groups.google.com/forum/?fromgroups=#!topic/scalaz/ZCahRpHPZZw), so I'm not sure if this is ready to merge yet. I'm putting it up again now instead of later so that I don't forget (as I'd be liable to otherwise).