0.9.1 - The "scope cutting" release

We've removed some tags from the Brick lineup. Namely, togglegroup, datepicker, and iconbutton. They may return post-1.0, but we want to re-evaluate their usability and code, and we don't want to remove components once we've reached a stable major version. Apologies if you were using them, if you need the JS/CSS for them let us know, we can provide the compiled files.