We need the scss, fonts, img assets for the ember client. There are small changes needed in the scss, thus I copied the assets folder into `core/client/assets`. 

As I did not see the need to have the old admin and ember admin in the ember branch, I did not configure the assets for the old admin separately. What are the benefits to have the old admin in the ember branch too?

The current changes to the scss are:
* Input field on the editor page had a transition. This was okay when loading reloading pages, but triggered an unwanted animation in case of the ember route change.
* Height of markdown + codemirror seems to be set in the old client javascript, thus I set it to a fixed weight. I think this should be solved with pure css rather than setting the height with javascript.