DIMITRI/JAMES: Make new Angular app the home page and deployable (cc ERIC)

Pushed to staging: http://vk812.gondor.co/

(NOTE: I had to comment out `manage.py migrate --noinput --delete-ghost-migrations` to get it to push to staging cleanly.)

New deployment process is documented in README.md:

    $ grunt --gruntfile ahgl/static/js/app/Gruntfile.js build
    $ git commit -A -m "Checking in production files to app/dist"
    $ gondor deploy <env> HEAD

@jdonaghue Running `grunt serve` will overwrite `app/app/config.js`. I figure that's okay for now as long as we don't check it in. `grunt build` will overwrite it anyway.

Fixes #43
`main.css` is an intermediate build file -- I'm not sure if it even gets created there. The original is `ahgl/static/js/app/app/main.less` and this gets turned into `ahgl/static/js/app/dist/styles/main.<hash>.css`.