Support for inverse associations

Hi all,

Way back at the start of December there was a discussion about my plugin parental_control and adding support for inverse associations to active record ( if you’re interested). I’ve finally managed to turn that discussion into a patch:

It does the simplest of simple things (you have to specify inverses manually, unlike parental_control which guesses them) and it doesn’t work for every association type, but I think it’s a good start. I’d love to hear what folk think of it.