Get the book live: hosted HTML build

[addyosmani]

At the moment a reader can't preview what's been written so far without checking out the repo, doing an npm install and running the gulp build setup. I'd like to propose that we either:

1. Add a gulp deploystep to the build process which can push the contents of dist to gh-pages for those with commit access. Possibly the cleanest option.
2. Move master to gh-pages, make it the default branch and have an index.html which lives outside of the dist directory but can be used to view the book.

There are probably lots of other options available to us, but just opening the floor for discussions or PRs to bring something in place :)

[sindresorhus]

We just got a recipe in generator-gulp-webapp for 1.: https://github.com/yeoman/generator-gulp-webapp/blob/master/docs/recipes/gh-pages.md

[sindresorhus]

Anyone wanna set this up?