change the building method
	modified:   build.xml
	new file:   html/index.html
	new file:   src/WEB-INF/appengine-web.xml
	new file:   src/WEB-INF/web.xml
	deleted:    war/WEB-INF/appengine-web.xml
	deleted:    war/WEB-INF/web.xml
	deleted:    war/index.html