added rb2b analytics (#2273)

Author: jjmachan

docs/_static/js/rb2b.js

@@ -0,0 +1,8 @@
+!function(key) {
+  if (window.reb2b) return;
+  window.reb2b = {loaded: true};
+  var s = document.createElement("script");
+  s.async = true;
+  s.src = "https://ddwl4m2hdecbv.cloudfront.net/b/" + key + "/" + key + ".js.gz";
+  document.getElementsByTagName("script")[0].parentNode.insertBefore(s, document.getElementsByTagName("script")[0]);
+}("0NW1GHLY45O4");

mkdocs.yml

@@ -288,3 +288,4 @@ extra_javascript:
   - https://cdn.octolane.com/tag.js?pk=c7c9b2b863bf7eaf4e2a # octolane for analytics
   - _static/js/reo.js # reo analytics
   - _static/js/commonroom.js # commonroom analytics
+  - _static/js/rb2b.js # rb2b analytics