release 0.2.4

Author: dfreedm

bower.json

@@ -2,7 +2,8 @@
   "name": "core-overlay",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master",
-    "core-transition": "Polymer/core-transition#master"
-  }
-}
+    "polymer": "Polymer/polymer#0.2.4",
+    "core-transition": "Polymer/core-transition#0.2.4"
+  },
+  "version": "0.2.4"
+}