R1:1df7d4039e20

Store repository credentials with repositories

Summary:
Move toward storing credentials in configuration so it's easier to get the
daemons working. This should eventually solve all the key juggling junk you have
to do right now.

This only gets us part of the way to actually using these credentials in the
daemons since I have to go swap everything for $repository->execBlah().

I tried to write a web "Test Connection" button but it was too much of a mess to
get git to work since git doesn't give you access…