Adds the CC-by-SA license attribution

index.html

@@ -281,7 +281,14 @@
             <h2 class="info__title">Feedback or Questions about edX Documentation</h2>
 
             <div class="info__copy">
-              <p>edX welcomes and appreciates your comments on and requests for documentation. Just email us at <a href="mailto:docs@edx.org">docs@edx.org</a>.</p>
+
+              <p>edX welcomes and appreciates your comments on and requests for documentation. Just email us at <a href="mailto:docs@edx.org">
+              docs@edx.org</a>.</p>
+              <br />
+              <br />
+              <p><a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-sa/4.0/80x15.png" /></a>
+              <br />
+              This work by <a xmlns:cc="http://creativecommons.org/ns#" href="http://open.edx.org" property="cc:attributionName" rel="cc:attributionURL">edX Inc.</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</p>
             </div>
           </div>
         </aside>