Adding section to increase transaction timeout

It's commented out, just uncomment it on dev boxes when running into "Transaction Timeout" exception when doing interactive debugging sessions of the app (default timeout is 1 minute, which is not much...)

--HG--
extra : convert_revision : svn%3A5ff7c347-ad56-4c35-b696-ccb81de16e03/trunk%4045937

src/Orchard.Web/Web.config

@@ -27,6 +27,14 @@
 
   <system.diagnostics configSource="Config\Diagnostics.config"/>
 
+  <!-- 
+        Set default transaction timeout to 30 minutes so that interactive debugging 
+        is easier (default timeout is less than one minute)
+  -->
+  <!--<system.transactions>
+    <defaultSettings timeout="00:30:00" />
+  </system.transactions>-->
+  
   <system.web>
 
     <!--