tests: Updating tests to have correct include path for ndn-js

Now all test cases include ndn-js.js directly.  Helper.js has been
removed from the source.

Status:
 - there is some problem with tests/test-PIT-matching.html
   In Chrome it complains about missing to_ccnb call on Object,
   In Firefox it is doing something, but not everything
diff --git a/tests/test-get-async.html b/tests/test-get-async.html
index 401d62d..ede20af 100644
--- a/tests/test-get-async.html
+++ b/tests/test-get-async.html
@@ -10,7 +10,7 @@
 <head>

 	<title>NDN Get via WebSocket</title>

 	

-	<script type="text/javascript" src="../tools/build/ndn-js.js"></script>

+	<script type="text/javascript" src="../build/ndn-js.js"></script>

 

 	<script type="text/javascript">

 		var ndn = new NDN();