Update README.md example to include lib requires
Update README.md example to include lib requires

The `README.md` lacked the library dependencies it required
in order to run. This adds those `require` statements in the
specific order they need to be loaded.

closes ruby-hyperloop/hyper-react#210

ruby-hyperloop/hyper-react,reactrb/reactrb,ruby-hyperloop/hyper-react,reactrb/reactrb,ruby-hyperloop/hyper-react