Clean repo/README.md, add option to disable extension and bump version to 2.

mangoUI.css

@@ -1,51 +0,0 @@
-body {
-    background-color: black;
-    color: white;
-    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
-}
-
-a {
-    color: orangered;
-    text-decoration: none;
-}
-
-a:hover {
-    color: white;
-}
-
-body::before {
-    content: "";
-    background-image: url(/img/mango-full.jpg);
-    position: absolute;
-    background-size: cover;
-    top: 0;
-    left: 0;
-    bottom: 0;
-    right: 0;
-    z-index: -1;
-    opacity: .25;
-}
-
-#whitelist {
-    background-color: black;
-    margin-bottom: 10px;
-    color: white;
-}
-
-#title {
-    font-weight: 300;
-    font-size: 50px;
-    margin: 0;
-}
-
-#whitelistSave {
-    border: 1px solid white;
-    background-color: black;
-    color: white;
-    font-size: large;
-}
-
-h2 {
-    font-weight: 300;
-    margin-top: 0;
-}