New collections package ready (almost)

Hello, I've set up the new collections package, and it compiles under ghc and hugs. I don't know about nhc, because I've been unable to compile nhc. (I've got a x86_64 system; I've tryied to compile under a chroot does not work, and configure program baffles me.) The non-ghc version is portable though, so it _should_ work under nhc alright. So, you can try to make "collections" a default package, so I can start moving stuff out of "base" into it. Cheers, JP.