[Closes #55] Apply background to html element

Author: jfacorro

priv/css/main.css

@@ -1,9 +1,11 @@
-body {
+html {
     background: url(../img/background.jpg) no-repeat center center fixed;
     -webkit-background-size: cover;
     -moz-background-size: cover;
     -o-background-size: cover;
     background-size: cover;
+    height: 100%;
+    overflow: hidden;
 }
 
 #content {