More fine grained control of branch permissions

[glianeric]

Hi,

Would it be possible to add more fine-grained permissions with respect to branches?
My requirements are as follows:

I want to block everyone from direct commits to master except for my automated build user.
I want to block all but the group responsible for a given project from direct commits into develop.

I would prefer to avoid using the build-in branch permissions and PR harmony at the same time, as PR Harmony simply makes life easier and I haven't found a way to set the branch permissions via API.