Add License information / Add Code for Virginia Beach

Here's my first stab at [adding license information] (http://github.com/codeforamerica/brigade/issues/92) to the About page and the footer.

Please let me know what you think, especially about the spacing between columns in the footer. If you think it should be done differently, please say so! :)

Also, I've added the new Code for Virginia Beach to the Connections page.


In [_footer.html.erb] (http://github.com/codeforamerica/brigade/blob/master/app/views/shared/_footer.html.erb):
<ul>
<li>Added a td element for the license information.</li>
<li>The width for the other tds had to be adjusted to maintain the current spacing between columns.</li>
</ul>

In [about.html.haml] (http://github.com/codeforamerica/brigade/blob/master/app/views/pages/about.html.haml):
<ul>
<li>Added a list entry for license information with content to match.</li>
</ul>

Also, in [connect.html.haml] (http://github.com/codeforamerica/brigade/blob/master/app/views/pages/connect.html.haml):
<ul>
<li>Added list item for Code for Virginia Beach to the Connections page.</li>
</ul>

Fixes #92.