remove more demo specific code

src/components/App/App.jsx

@@ -34,6 +34,11 @@ class App extends Component {
         }
     }
 
+    componentWillMount() {
+        if(document.getElementById('footer'))
+            document.getElementById('footer').style.visibility = "visible";
+    }
+
     render() {
         return (
             <div>

src/components/App/App.scss

@@ -39,20 +39,3 @@ body {
     content: "\2122";
     color: transparent !important;
 }
-#footer {
-    /* used in demo */
-    color: #777;
-    font-size: 0.9em;
-    line-height: 1.8em;
-    h4 {
-        margin-top: 20px;
-        color: #d9534f;
-    }
-    a {
-        text-decoration: underline;
-    }
-    #copyright {
-        border-top: 1px #aaa solid;
-        padding: 10px 0px;
-    }
-}