Fixes #9 - Update cross-promotional section

static/css/main.css

 *
 {
   font-family: Arial, sans;

[ire, 2018/02/06 16:31:14]

The correct font-family isn't being applied yet so the implementation may not
look exactly correct. I'm not sure why the font wasn't changed with the start of
the updated design, I'll double check about that and handle it in a separate
issue.

   font-size: 16px;
 }
 
 body
 {
   margin: 0;
   line-height: 1.5;
 }
 
 #content
@@ skipping 230 matching lines @@
 }
 
 /*******************************************************************************
  * .bg-* utilities
  ******************************************************************************/
 
 .bg-accent
 {
   color: #fff;
   background-color: #077CA6;
+}
+
+.bg-secondary
+{
+  color: #000;
+  background-color: #F4F4F4;
 }
 
 /*******************************************************************************
  * #navbar
  ******************************************************************************/
 
 #navbar
 {
   min-height: 4em;
   background-color: #c70d2c;
@@ skipping 418 matching lines @@
   {
     display: none;
   }
 
   /* overriding display:none above */
   #footer #social-list
   {
     display: block;
   }
 }