Added GA-enabled weblink.

index.html

@@ -17,9 +17,9 @@
         	    <dt>gitflow</dt>
         		<dd>
 					<p>Provides a set of tools to support managing the <a
-					href="http://nvie.com/archives/323">Git branching model</a>
+					href="http://nvie.com/git-model?utm_source=github&utm_medium=web&utm_campaign=branch-model">Git branching model</a>
 					as introduced in Vincent Driessen's original blog post.</p>
-					<p><a href="http://nvie.com/archives/323"><img src="branches-overview.png" /></a></p>
+					<p><a href="http://nvie.com/git-model?utm_source=github&utm_medium=web&utm_campaign=branch-model"><img src="branches-overview.png" /></a></p>
                 </dd>
     		</dl>
         </div>