New setup screen and process for blog installation

[ErisDS]

Replacing the old issue: #1794

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• When installing Ghost / setting up the first user, Ghost should redirect to /ghost/setup/ instead of /ghost/signup/.
• The setup screen should look like the above screenshot. Pre-styled markup for the screen exists here: https://github.com/TryGhost/Ghost/blob/master/core/client/html/setup.html
• The setup process has 'blog title' which is additional to the old signup process. This will need validating and wiring up to get saved on the server side.
• On the server side, the blog.description should be automatically set to: "Thoughts, stories and ideas by [user.name]"
• Everything else should work exactly as per the old signup screen, the user should be created and automatically logged in, the welcome email should be sent, etc.

Question: should the setup be posted to an admin route, or do we need to move this onto the API? I'd say leave it as an admin route for now.

Note: the routes mentioned assume the ember admin is now the default, but that doesn't have to be done first.

[sebgie]

I'm sorry, and I hate when this happens but I have missed this question:

Question: should the setup be posted to an admin route, or do we need to move this onto the API? I'd say leave it as an admin route for now.

Yes it should be moved to the API. By the time we have finished the ember admin the admin controller should ideally consist of only a single controller for the index page to load the Ember client. All other actions are going to target the API.

When all this work is finished it will be theoretically possible to serve the Ember admin from a simple web server and all necessary data is fetched from the API.

I'll open an issues for that. The change is mostly for consistency and not urgent.