Add package.json and install webpack via npm

I'm using this project to review and demonstrate basic use of webpack
with a hybrid JS build system that piggybacks off of Sprockets to serve
bundled modular JavaScript.
Add es6-loader to node_modules and package.json

We will be using the es6-loader to process our JS when loaded by
webpack. Why?
 * Demonstrates using a loader and the flexible nature of webpack
 * Allows using ES6 syntax, which is fun and enhances coding style
Update README
Remove turbolinks

We don't want to use turbolinks - a choice will be made to use
[pjax][1], the [Backbone router][2], or nothing at all.

See [Removing Turbolinks from Rails 4][3].

[1]: https://github.com/defunkt/jquery-pjax
[2]: http://backbonejs.org/#Router
[3]: http://blog.steveklabnik.com/posts/2013-06-25-removing-turbolinks-from-rails-4
Configure RSpec as testing library

Ran 'rails generate rspec:install' and tweaked some configurations.
Will probably need to do more specific setup to get tests running, but
first we need to build an MVP to test.
Add initial webpack.config

This is an annotated, simple version of webpack configurations.
It probably will need tweaking when we actually get to using webpack
with React.
Scaffold creation of Game resource with name attribute

A 'Game' is just a container for a number of points on a grid that will
change based on the rules of Conway's game of life. The points will be a
separate model, which will later facilitate introducing more complex
rules and different types of "creatures".

Because the 'Game' model just serves as the owner of many 'Life' models,
it just needs a name. The foreign key will be on the 'Life' model.
Set root url to new game page
Scaffold Life model

We will be updating the 'lives' resource as a nested resource under the
'Game'. Therefore no views or controller were needed for the 'Life'
resource.
Add validations for attributes of Game and Life models
Add React-Rails and Debugger gems; load React with Sprockets

While adding the 'react-rails' gem, we also removed the 'coffee-rails'
gem and added the 'debugger' gem.
The metacomment added to the 'application.js' should now load React.js
using Sprockets.
Bootstrap Game and Life data into games/show and add associations

 * Added association that Game model has_many Life models
 * Fixed up the jbuilder templates for game and added one for life
 * Render nested 'Life' resource in 'Game' JSON
 * Bootstrap the game JSON into the 'show' template HTML