Feature * Automatically figure out the root of the function tree ([`19f21e1`](https://github.com/mcbeet/beet/commit/19f21e10770fa02c2d99c23d43d54443d1e32b08))
Breaking * generate_tree no longer accepts the root argument in templates ([`19f21e1`](https://github.com/mcbeet/beet/commit/19f21e10770fa02c2d99c23d43d54443d1e32b08))