Added common files (geo layers, css, js and images) as well as the geo plot method and a mechanism to insert the mnr css etc files in the header

inst/www/js/frameHeight.js

@@ -0,0 +1,7 @@
+window.addEventListener('message', function (event) {
+  if (event.data == "FrameHeight") {
+    var body = document.body, html = document.documentElement;
+    var height = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight);
+    event.source.postMessage({ "FrameHeight": height }, "*");
+  }
+});