README.md edited online with Bitbucket

README.md

 
 The easiest way to test Tracim is to test it through the online demo:
 
-* [http://demo.tracim.org](http://demo.tracim.org)
+* [http://demo.tracim.fr](http://demo.tracim.fr)
 * login as admin: admin@admin.admin
 * password: admin@admin.admin