Fix inconsistent instructions.

GettingStarted.wiki

diff --git a/GettingStarted.wiki b/GettingStarted.wiki
index 57d4264..98a8a23 100644
--- a/GettingStarted.wiki
+++ b/GettingStarted.wiki
@@ -80,7 +80,7 @@
 You can start the server on your computer by running:
 
 {{{
-thirdparty/google_appengine/dev_appserver.py app
+thirdparty/google_appengine/dev_appserver.py --allow_skipped_files build
 }}}
 
 You should now be able to see the running server at [http://localhost:8080/] .  Congrats!  You've got Melange running!