First draft for a new editor.

Definitely needs feedback if someone can pull this branch and give me an opinion.

Issue #271
Adds widerea support for fullscreen.

Now the HTML definitely needs love.

Issue #271
Improves the editor

* Makes the button toolbar less visible
* Makes the editor resize when loading an existing post (still need to understand how to resize it when deleting).
* Make the font smaller, everyone don't use a 30" screen with an insane resolution

TODO :

* Make the quicktag vertical, on the editor side
* Hide the quicktags except when the mouse is over the left or right zone
Even more editor improvement. Love this.

Issue #271
And now it's the pages editor turn.

Issue #271
Merge pull request #293 from fdv/feature/new-editor/271

Adds a new editor, like it