readme added to know to configure apache and hosts

REAME

+To run these examples you must bind "domain1", "domain2" and "ads.com" to
+127.0.0.1 in /etc/hosts.
+
+### /etc/hosts sample ###
+127.0.0.1 domain1
+127.0.0.1 domain2
+127.0.0.1 ads.com
+#########################
+
+Then modify your apache configuration file (mine is /etc/httpd/conf/httpd.conf)
+and change the value of "DocumentRoot" to the path of your local js.security
+cloned git repository.
+
+### sample ###
+DocumentRoot="/srv/http/js.security"
+##############
+
+Now, restart apache and open url: "http://domain1".