validate command arguments
Have luigi use the same parameter options as the rest of mortar.
If someone uses projects:fork from a public project in mortarcode than we'll have two possible remotes to use.  We'll pick the one called mortar (since that's what we call it in the fork command) as the one to use by default.
Forgot my closing bracket.
Sort parameters by name so that its easier to write tests.
Merge pull request #178 from mortardata/jkarn_params

[#66340070, #66082818, #66375040] Jkarn params