Maintain preset flags

Previously this was just bashing over any flags you passed in.

src/WebComponents/build/boot.js

@@ -19,7 +19,6 @@ window.WebComponents = window.WebComponents || {};
   var script = document.querySelector('script[src*="' + file + '"]');
 
   // Flags. Convert url arguments to flags
-  var flags = {};
   if (!flags.noOpts) {
     // from url
     location.search.slice(1).split('&').forEach(function(o) {