Add DebugBear

Author: csswizardry

_includes/head.html

@@ -37,6 +37,8 @@
   });
 </script>
 
+<script>(function(){var dbpr=100;if(Math.random()*100>100-dbpr){var d="dbbRum",w=window,o=document,a=addEventListener,scr=o.createElement("script");scr.async=!0;w[d]=w[d]||[];w[d].push(["presampling",dbpr]);["error","unhandledrejection"].forEach(function(t){a(t,function(e){w[d].push([t,e])});});scr.src="https://cdn.debugbear.com/vUKP1Yu0eg5g.js";o.head.appendChild(scr);}})()</script>
+
 <script>performance.mark('cssStart');</script>
 <style>