SCSS und babel-loader

Fixes #3 (closed), #4 (closed)

assets/bbb-connector.scss

@@ -35,11 +35,12 @@ table {
 .bbb-metrics {
     .contentbox {
        > section {
-           .flex();
-           .flex-wrap(wrap);
+           display: flex;
+
+           flex-wrap: wrap;
 
            div {
-               .flex-item(1 0 50%);
+               flex: 1 0 50%;
            }
            .ct-label {
                font-size: 1.2rem;