Implement asciinema plugin

Close #66

js/plugins.js

@@ -266,7 +266,23 @@ plugins.factory('userPlugins', function() {
     });
     googlemapPlugin.name = 'Google Map';
 
+    /*
+      * Asciinema plugin
+     */
+    var asciinemaPlugin = new Plugin(function(message) {
+
+	var regexp = /http(s){0,1}:\/\/(www\.){0,1}asciinema.org\/a\/(\d+)/;
+	var match = message.match(regexp);
+	if (match) {
+            var id = match[3];
+            return "<script type='text/javascript' src='https://asciinema.org/a/" + id + ".js' id='asciicast-" + id + "' async></script>";
+	}
+    });
+    asciinemaPlugin.name = "ascii cast";
+    
     return {
-        plugins: [youtubePlugin, dailymotionPlugin, allocinePlugin, imagePlugin, spotifyPlugin, cloudmusicPlugin, googlemapPlugin]
+        plugins: [youtubePlugin, dailymotionPlugin, allocinePlugin, imagePlugin, spotifyPlugin, cloudmusicPlugin, googlemapPlugin, asciinemaPlugin]
     };
+
+
 });