Use a CSS sprite for the license images.

-3 HTTP requests.

_includes/license-overview.html

@@ -36,7 +36,10 @@
                 {% for rule_obj in rules %}
                   {% assign req = rule_obj.tag %}
                   {% if variation[type] contains req %}
-                    <li class="{{ req }}">{{ rule_obj.label }}</li>
+                    <li class="{{ req }}">
+                      <span class="license-sprite"></span>
+                      {{ rule_obj.label }}
+                    </li>
                   {% endif %}
                 {% endfor %}
               </ul>

_includes/sidebar.html

@@ -14,7 +14,10 @@
   </div>
   {% if page.source %}
   <div class="source">
-    <a href="{{ page.source }}">Source</a>
+    <a href="{{ page.source }}">
+      <span class="license-sprite"></span>
+      Source
+    </a>
   </div>
   {% endif %}
 
@@ -28,7 +31,10 @@
       {% for rule_obj in rules %}
         {% assign req = rule_obj.tag %}
         {% if page[type] contains req %}
-          <li class="{{ req }}">{{ rule_obj.label }}</li>
+          <li class="{{ req }}">
+            <span class="license-sprite"></span>
+            {{ rule_obj.label }}
+          </li>
         {% endif %}
       {% endfor %}
     </ul>

css/application.css

@@ -263,30 +263,26 @@ strong {
 .license-rules .label {
   font-weight: bold;
 }
+
 .license-rules li {
-  background-position: 0 1px;
-  background-repeat: no-repeat;
-  background-size: 12px 12px;
   margin-right: 15px;
   margin-bottom: 5px;
-  padding-left: 16px;
 }
 
 .license-rules li:hover {
   color: #443a33;
 }
 
-.license-required li {
-  background-image: url(../img/blue-dot@2x.png);
+.license-sprite {
+  background-image: url(../img/license-sprite.png);
+  background-repeat: no-repeat;
+  display: inline-block;
 }
 
-.license-permitted li {
-  background-image: url(../img/green-dot@2x.png);
-}
-
-.license-forbidden li {
-  background-image: url(../img/red-dot@2x.png);
-}
+.sidebar .source span   { background-position: 0 0;     width: 16px; height: 12px; }
+.license-forbidden span { background-position: -16px 0; width: 12px; height: 12px; }
+.license-permitted span { background-position: -28px 0; width: 12px; height: 12px; }
+.license-required span  { background-position: -40px 0; width: 12px; height: 12px; }
 
 .license-rules-sidebar li {
   float: none;
@@ -346,12 +342,6 @@ strong {
   margin-bottom: 30px;
 }
 
-.sidebar .source a {
-  padding-left: 20px;
-  background: transparent url(../img/source@2x.png) 0 1px no-repeat;
-  background-size: 16px 12px;
-}
-
 .sidebar .boilerplate {
   font: 0.7em "Courier new", courier;
 }
@@ -493,4 +483,12 @@ strong {
     -moz-background-size: 72px 198px;
     background-size: 72px 198px;
   }
+
+  .license-sprite {
+    background-image: url(../img/license-sprite@2x.png);
+    -webkit-background-size: 52px 12px;
+    -moz-background-size: 52px 12px;
+    background-size: 52px 12px;
+  }
+
 }