Add notes about testing the component build.

Author: rstacruz

Notes.md

@@ -9,10 +9,17 @@ Testing
     $ npm install
     $ npm test
 
-or
+or try it out in the browser:
 
     $ open test/index.html
 
+Testing component build
+-----------------------
+
+    $ component install
+    $ component build
+    $ open test/component.html
+
 Pushing
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