Ability to toggle RSS

Ability to toggle RSS feed by setting .Site.Params.rss (defined in
config.toml in the [Params] section)

exampleSite/config.toml

@@ -12,6 +12,7 @@ pygmentCodeFences = true
   logo = "img/avatar-icon.png"
   favicon = "img/favicon.ico"
   commit = false
+  rss = true
 
 [Author]
   name = "Some Person"

layouts/partials/footer.html

@@ -163,7 +163,7 @@
             </a>
           </li>
           {{ end }}
-
+          {{ if .Site.Params.rss }}
     		  <li>
       			<a href="{{ .Site.BaseURL}}index.xml" title="RSS">
       			  <span class="fa-stack fa-lg">
@@ -172,7 +172,7 @@
       			  </span>
       			</a>
     		  </li>		
-
+          {{ end }}
         </ul>
         <p class="credits copyright text-muted">
     	  {{ .Site.Author.name }}