comment out metadata files that don't exist

metadata.html

@@ -2,19 +2,22 @@
 <link rel="import" href="../chart-js/metadata.html">
 <link rel="import" href="../code-mirror/metadata.html">
 <link rel="import" href="../cool-clock/metadata.html">
-<link rel="import" href="../flatiron-director/metadata.html">
-<link rel="import" href="../g-kratu/metadata.html"> 
 <link rel="import" href="../google-map/metadata.html">
+<link rel="import" href="../smoothie-chart/metadata.html">
+<link rel="import" href="../three-js/metadata.html">
+<link rel="import" href="../yt-search-video/metadata.html">
+
+<!-- 
+<link rel="import" href="../flatiron-director/metadata.html">
+<link rel="import" href="../g-kratu/metadata.html">
 <link rel="import" href="../humane-js/metadata.html">
 <link rel="import" href="../js-beautify/metadata.html">
 <link rel="import" href="../marked-js/metadata.html">
 <link rel="import" href="../pdf-js/metadata.html">
 <link rel="import" href="../pixi-js/metadata.html">
-<link rel="import" href="../smoothie-chart/metadata.html">
 <link rel="import" href="../speech-mic/metadata.html">
 <link rel="import" href="../speech-transcript/metadata.html">
 <link rel="import" href="../tk-buildbot/metadata.html">
-<link rel="import" href="../three-js/metadata.html">
 <link rel="import" href="../typeahead-input/metadata.html">
 <link rel="import" href="../wu-weather/metadata.html">
 <link rel="import" href="../x-binding/metadata.html">
@@ -30,7 +33,7 @@
 <link rel="import" href="../x-palette/metadata.html">
 <link rel="import" href="../x-property-inspector/metadata.html">
 <link rel="import" href="../x-tags/metadata.html">
-<link rel="import" href="../x-tree/metadata.html"> 
-<link rel="import" href="../yt-search-video/metadata.html">
+<link rel="import" href="../x-tree/metadata.html">
 <link rel="import" href="../yt-search/metadata.html">
-<link rel="import" href="../yt-video/metadata.html"> 
+<link rel="import" href="../yt-video/metadata.html">
+ -->