afaik M1 is only branch, and i'm wondering if we need to completely avoid committing to M1 now, since its tagged "final". lets see if andy can give us any feedback on this.
so i'm guessing we should make sure all the changes made to M1 get merged into HEAD asap, and then at some point in the future split off another branch from HEAD for M2?
Kabir: Yes. I need to merge all of the persistence changes I made into HEAD.