Added CMS_CORE_MODULE which is the mandatory module for ROC CMS.

Added CMS_USER.profile_name .
Improved module managements with install vs enable.
  - enabled/disabled status can also be stored in database.
Install procedure do not install all available modules anymore.

modules/session_auth/cms_session_auth_module.e

@@ -34,6 +34,7 @@ feature {NONE} -- Initialization
 			Precursor
 			version := "1.0"
 			description := "Service to manage cookie based authentication"
+			enable -- Enabled by default
 		end
 
 feature -- Access