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-sha256.html b/tests/test-sha256.html
index d441249..ef62010 100644
--- a/tests/test-sha256.html
+++ b/tests/test-sha256.html
@@ -9,7 +9,7 @@
 <head>

 	<title>Test SHA-256</title>

 

-    <script type="text/javascript" src="../Helper.js"></script>

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

 

 	<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/sha256.js"></script>