A little revamping of the login / register / confirm / lost password pages.

This adds a little more consistency. Now we probably need to review some translations, starting with the French one that definitely sucks.
Improves the admin layout view.

Drops the left margin of the menu to give the content 20 more px.
Improves the footer.
Moves the help and user menu to the right.
A little bit revamping of the setup. I had forgotten this one.
Reduce the admin stylesheet font size to display more content on the screen.

Changes the font to Open Sans (I like it) and embed the font.
The login / setup won't change.
Merge branch 'master' of github.com:fdv/typo