Not finished and not working, yet. They recommend the "Git Gateway" backend, which requires us to use their Netlify Identity product, but I'd like to avoid that, as it means we'll have to manage users separately.

They offer a github-oauth-api gateway which we can use to get things started, and later switch to a self-hosted proxy, if we prefer, without much hassle.

Also, I only added the config for the news collection, so far.

Fixes #31

- Fixed figure component to output/render HTML.
- Added Magazin collection
- Added Magazin preview, tweaked News preview as well
- Tweaked author rendering in preview

- Allow picking a custom slug
- Fixed cover image showing on draft/preview and published
- Added class selector to figure widget

Unfortunately, I couldn't get the images uploaded inside the figure block to show in the preview, but they should show after saving.

Fixes #38
Fixes #11