Add Turbolinks

[davidpdrsn]

I have looked through all the javascript and made some changes. Issue is that Turbolinks only evaluates the js on the initial page load, but when following links. Thus binding to DOMContentLoaded or window.onload wont work. You have either use event delegation (which they recommend) or bind to turbolinks:load like so

document.addEventListener "turbolinks:load", ->
  # ...

There still still something wrong with timeline.js.coffee. Doesn't work 😞

How to test:

• Navigate to a page that isn't the feed, such as a user's profile.
• Reload the page.
• Click the logo to get back to the feed.
• Scroll down. The cards should fade in as you scroll.

@bendobos wanna look into the issues with the timeline? Would be cool if we could get it working again 😊

Missing

• [ ] Rebase with master and update relative time replacement in javascript to not bind to dom ready.

[davidpdrsn]

By the way I can highly recommend Turbolinks' documentation.