fix display of LP 17 banner

by moving the gmg logo down and setting a negative margin in the
container div.

mediagoblin_libreplanet/templates/libreplanet/banner.html

@@ -16,7 +16,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #}
 
-<div style="position: absolute; margin-left: -30px; width: 1000px;">
+<style>
+.logo img { margin-top: 70px; }
+.header_left { position: relative; margin-bottom: -64px; }
+</style>
+
+<div style="position: absolute; margin-left: -30px; top: 0; width: 1000px;">
     <iframe src="//static.fsf.org/nosvn/banners/libreplanet/libreplanet-banner.html" width="100%" height="64px" frameborder="0" scrolling="no"></iframe>
 </div>