Add emphasis to the login area, remove footer backdrop

Here are the changes:

* A shaded box surrounds the login area with 'login' and 'register' in bold, blue print for emphasis and added weight.
* The footer background now blends in with the body background until a way to keep the footer on the bottom is implemented.

Here is the result:

![](http://i.imgur.com/Xi8tPRK.png)

The shaded box was originally added to the area only when users weren't logged in, but I decided to also implement it for logged-in users for consistency. :-)

How does it look?