Add javascript plugin capabilities

Change-Id: I36af515651adbb5a2c20eca14f8a3d2b16ccfa69
diff --git a/assets/mainfest.json b/assets/mainfest.json
new file mode 100644
index 0000000..f24a032
--- /dev/null
+++ b/assets/mainfest.json
@@ -0,0 +1,13 @@
+{
+  "name" : "Externak Sale",
+  "desc" : "Buy content from an external provider",
+  "embed" : [{
+    "panel" : "match",
+    "title" : "Buy",
+    "classes" : ["cart"],
+    "onClick" : {
+      "action" : "addWidget",
+      "template" : "http://localhost:3003/demo/plugin-client.html"
+    }
+  }]
+}
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