Removing internal references to the EXT constant.  Additionally, marked the constant as deprecated.  Use ".php" instead. Also adding upgrade notes from 2.0.2 to 2.0.3.
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 9890f60..945b104 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -66,6 +66,7 @@
 	<li>General Changes
 		<ul>
 			<li>Added Session Class userdata to the output profiler.  Additionally, added a show/hide toggle on HTTP Headers, Session Data and Config Variables.</li>
+			<li>Removed internal usage of the <samp>EXT</samp> constant.</li>
 		</ul>
 	</li>
 	<li>Helpers