Working for me in 2.1, I have a few issues however.
First is that I can't remove non-spells (potions, trinkets, etc) from the bars once their there, I have to delete the button. Second is that on a rare occasion spells will simply vanish without reason from the bars, usually on login not randomly during a session. Lastly, there seems to be a problem with cooldowns and stances/shapeshifts. If I use a cooldown, for example in bear form then switch to caster and back again to bear the button doesn't display the accurate remaining cooldown, rather it thinks the cooldown has expired.
Otherwise a great mod, so easy to setup for shapeshifting/stance classes!