New Editor Layout

[disordinary]

This bumps the editor to 14 (13 wasn't so lucky).

Requires: TryGhost/Admin#355
Refs: #7429

It includes:

• The title is integrated into the content.
• The toolbar has been revamped, that annoying under paragraph toolbar has been removed in favor of a block level changed (on the left hand side of the content).
• The toolbar also has the ability to create links.
• Additional markdown support within the editor including # h1 headings, ## h2 headings, ### h3 headings, 1. lists, * lists, - lists, > blockquote, _italic_, *italic*, __bold__, **bold**, ~~strikethrough~~, [links](http://www.ghost.org/), ![images](https://placekitten.com/200/300) (warning will replace the entire block).

Footnotes and codeblocks are on our todo, we won't be supporting inline HTML, however there are markdown and HTML cards which can be inserted into the content.

Whew, it's getting there. What you see is still placeholder styling - but we're slowly refining towards something that's useful. 🍾