404 error handling for admin & blog

[ErisDS]

1. Improve 404 error handling for Ghost admin urls:

Current Behaviour:
If you navigate to /ghost/fsdf you receive an error message Cannot GET /ghost/fsdf

Desired Behaviour:
Serve a template which says Ghost 404 Page Not Found and that we can edit with a nice design later.

2. Improve 404 error handling for blog/general urls:

Current Behaviour:
If you navigate to /fsdf (assuming there is no post with that slug) the page spins.

Desired Behaviour:
If the theme does not provide a 404.hbs template, then serve our Ghost 404 template.

[cgiffard]

Happy to take this one.

[JohnONolan]

Ghost Admin 404 Design - #447

For the theme / front-end output, Ghost should look for 404.hbs - if none exists, it should simply output

<h1>404</h1>
<h2>Page Not Found</h2>

in {{{body}}} of default.hbs

Also make sure that {{bodyclass}} (See #389) is passed an error-404 class.

[cgiffard]

Thanks, @JohnONolan. I'll plug that in. :)

[ErisDS]

Still want this? The API stuff is way more important and quite a big chunk of work ;)

[cgiffard]

I want something small so I can get my head back into ghost-space. Small issues are good for me over the next couple of days, so I can feel like I'm achieving something.

Then I'll attack the API. :)

[ErisDS]

🍩 🍰

[cgiffard]

Done. Just about to push. Finally!