Updated CMS_SERVICE to make the cms library complete void-safe.

Reviewed configuration related feature.
Renamed JSON_CONFIGURATION as APPLICATION_JSON_CONFIGURATION_HELPER to avoid confusion.
Updated CMS_DEFAULT_SETUP to use configuration from cms configuration library.
Added {CMS_API}.module_configuration (a_module_name: READABLE_STRING_GENERAL; a_name: detachable READABLE_STRING_GENERAL): detachable CONFIG_READER  to help getting access to configuration of a module (for now, only json and ini are supported, but in the future, this could support database layer directly)
Added CMS_HOOK_BLOCK_HELPER to reuse the template_block (..): ... function.
Cosmetic
Removed CMS_SETUP.smtp_server since for now, there is no need for such general setting.
Add header line "X-ServerEWF-App: CMS" as a simple way to know if request is processed by the CMS.

examples/demo/src/ewf_roc_server.e

@@ -2,8 +2,8 @@ note
 	description: "[
 				application service
 			]"
-	date: "$Date$"
-	revision: "$Revision$"
+	date: "$Date: 2014-11-20 15:03:29 +0100 (jeu., 20 nov. 2014) $"
+	revision: "$Revision: 96138 $"
 
 class
 	EWF_ROC_SERVER