So, for `jpm`, I implemented module overloading -- by adding a `config.json` to the directory. This contains metadata concerning **this** specific run, not the addon itself. The `config.json` had overloaded flags as true and copied in the addon-sdk dir. I think having the test options, and other configurations, in the same json would be helpful. This would allow people to override some settings too. Or maybe this all should live in `package.json`?