Add paths support

[mrcthms]

This gives us the ability to support the paths feature of browserify which allows us to do really nice things such as:

var jsOpts = {
  src: './src/js/script.js',
  dest: path.join(buildPath, 'js/bundle.min.js'),
  react: true,
  resolvePath: resolvePath,
  jquery: false,
  paths: ['./src/helpers']
};

which then in tern allow us to do the following:

// src/js/partials/Footer/Footer.js

// bad horrible
import { helperName } from '../../../helpers/helperFile';

// yayyyy
import { helperName } from 'helperFile';