I did this with three.js version 62 by making it a meteor package, then pointing the environment variable PACKAGE_DIRS to the root directory containing your local packages so they show up in "meteor list".
Package.describe({
summary: 'threejs webgl 3D graphics library'
});
Package.on_use(function (api) {
api.add_files('client/compatibility/three.js', ['client']);
api.add_files('client/OrbitControls.js', ['client']);
api.export('THREE');
});