Add data-path restriction to tutorial, part 2.

native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst

Index: native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst
diff --git a/native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst b/native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst
index 3f8de272cfdcc838429e8de95dec84a20ae0f6f2..7dd9b23f463ac0498fc4f0ddd5347a29d147fbce 100644
--- a/native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst
+++ b/native_client_sdk/src/doc/devguide/tutorial/tutorial-part2.rst
@@ -301,7 +301,9 @@ configurations, and path to the ``.nmf`` file:
 example with different toolchains by changing the URL's `query string
 <http://en.wikipedia.org/wiki/Query_string>`_. For example, you can load the
 glibc Debug version of this example by navigating to
-``index.html?tc=glibc&config=Debug``.
+``index.html?tc=glibc&config=Debug``.  Path URI's such as ``../``, for example
+do not work for either the data-path parameter or its corresponding query
+string.

[JF, 2014/09/02 20:57:34]

I think this is helpful, but IIUC the confusion from the original post came from
not specifying that a local web server had to be started: the user assumed file
URIs would work, but they don't.

This tutorial doesn't mention starting a server, so I think it would be good to
add this too (and keep you change here).

 
 Next, we remove the ``embed`` element that is described in HTML. This will be
 automatically added for us by ``common.js``, based on the current