Move Documentation and Support links to separate tab. Add a

contributing section.  Unify help/landing section CSS/html a little.
Expand the sponsors panel area in preparation for an updated section.

tabs/help.js

@@ -0,0 +1,21 @@
+'use strict';
+
+TABS.help = {};
+TABS.help.initialize = function (callback) {
+    var self = this;
+
+    if (GUI.active_tab != 'help') {
+        GUI.active_tab = 'help';
+        googleAnalytics.sendAppView('help');
+    }
+
+    $('#content').load("./tabs/help.html", function () {
+        localize();
+
+        if (callback) callback();
+    });
+};
+
+TABS.help.cleanup = function (callback) {
+    if (callback) callback();
+};