Switched package.json Dependencies to be devDependencies

None of the dependencies are necessary for using the library, so they should all be devDependencies.

This allows the Angular library to be fetched with npm (e.g., `npm install --save https://github.com/angular/angular.js.git#v1.0.x`).

You can also apply this patch to HEAD, and just fix the version number, or I can submit a new pull request.