Homestyx hydra

R1:df5a031b54a5

Allow "Repository Automation" to be configured for repositories

Summary:
Ref T182. This allows you to assign blueprints that a repository can use to perform working copy operations. Eventually, this will support "merge this" in Differential, etc.

This is just UI for now, with no material effects.

Most of this diff is just taking logic that was in the existing "Blueprints" CustomField and putting it in more general places so Diffusion (which does not use CustomFields) can also access it.

Test Plan…
Repository: R1 hydra
Commit Date: Oct 13 2015