Uncouple from suit

[pawamoy]

Work is in progress to uncouple suit-dashboard from suit. A new name should then be used, something like django-admin-dashboard to keep things simple? Or something more personal?

Of course the display is way better with Suit but not everybody want to use it. The main issue is that we can't extend the admin index.html since admin or simple admin app in settings' apps will always result in "you don't have any permissions to edit" message.

So we have to implement a special html base that display again the list of applications.

[pawamoy]

Displaying the list of applications is left to the user. Uncoupling done (handle breadcrumbs for Suit and classic styles, add context variable suit)