Only run specific steps in an octo project

[nitrocode]

We have a packerize step at the end of every release and each step might have different params attached. Without having to create a separate project with all the packer steps and keeping them in sync with the individual projects, it would be nice to be able to run the existing projects by only running a single step by name.

I'm aware of the --skip argument but that requires knowing all the step names in advanced and some of the projects have 20 steps or 15 steps with different names. The packerize step always has the same naming convention so it would be nice to have a switch like --run-step which will only run a single step and it can be chained --run-step "step 1" --run-step "step 8"