Derive defaults from meta_ recipe (or role?)

[patcon]

As you alluded to @tommyh, would be nice to make the app more of a first-class citizen. Seems another thing baked into the app at the moment is the idea of defaults for checkboxes.

Perhaps this would be a reason to consider converting meta_* recipes into roles. I realize that soloist doesn't currently support roles, nor are the pivotal devs used to dealing with roles, so it's not as trivial as it may first appear.

But whether roles or recipes, we could probably do something clever with populating other checkboxes based on whether a meta_ recipe/role were selected.

/cc @mkocher

[patcon]

Oh hey, and the other benefit of roles would be that we could use chef to expand the run_list without our own code. Using recipes we need to parse include recipes