Added readme explaining that contacts is now a single application.

samples/contacts/readme.txt

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+
+
+The contacts application demonstrates the main Acegi Security features in action in a web application. Prior to version
+1.0.5, the application was built into several separate WAR files, each using different features - X.509, CAS, LDAP etc.
+
+In the interest of simplicity it has now been refactored into a single web application. The web application context is
+loaded from /WEB-INF/applicationContext-acegi-security.xml. The other context files have been left in the WEB-INF
+directory for reference but aren't used in the application.
+
+To run the application, assuming you have checked out the source tree from subversion, run
+
+mvn install
+
+from the project root. Then run
+
+mvn jetty:run
+
+from the contacts sample directory. This should start the web application on port 8080 for you to try out.
+
+$Id$