Add 'powered by smartfox server' logo

I added the logo at the right bottom corner. It looked like this:

src/main/webapp/css/main.css

@@ -263,4 +263,14 @@ width: 100%;
 .menu ul li ul {
     left: 100%;
     top: 0;
+}
+.powered-by-sfx-container{
+    position: absolute;
+    right: 0px;
+    bottom: 0px;
+    max-width: 200px
+}
+.sfx-logo{
+    width: 100%;
+    height: auto;
 }
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