Duplicate devDependencies?

Why do you duplicate your dependencies for `npm` in your `package.json`? I tried getting this to work on my end just using `jspm`, but Mocha running globally or from my `jspm_packages` folder couldn't find commander and "babel/register".

Once you I copied the `devDependencies` like you did in my `package.json`, and ran `npm install`, everything worked. How come I can't just use jspm?

Start with package.json and reproduce the reported setup using jspm, globally installed Mocha, and Mocha from jspm_packages. Trace how commander and babel/register are resolved, then confirm whether the dependency configuration needs a code or documentation change and define done as a working, clearly explained setup.

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