Added support for path_aliases.

Refactored CMS_MODULE.router (..): WSF_ROUTER design,
  to create only one router object of type CMS_ROUTER.
Added optional CMS_NODE.link: CMS_LOCAL_LINK
Reviewed permissions related to node module.
Refactor and add CMS_STORAGE_SQL(_BUILDER) abstractions
   for implementation relying only on SQL statements.
Factorized sql builder initialization (to work for sqlite and mysql storage builders).
Added CMS_RESPONSE.formatted_string (a_text: READABLE_STRING_GENERAL; args: TUPLE): STRING_32
Added function "translation", but not implemented for now.
Updated indexing notes and comments.
Code cleaning.

library/persistence/implementation/store/cms_storage_store_sql.e

@@ -1,6 +1,5 @@
 note
-	description: "Summary description for {CMS_STORAGE_STORE_SQL}."
-	author: ""
+	description: "Storage based on Eiffel Store component."
 	date: "$Date: 2015-02-13 13:08:13 +0100 (ven., 13 févr. 2015) $"
 	revision: "$Revision: 96616 $"
 
@@ -8,9 +7,7 @@ deferred class
 	CMS_STORAGE_STORE_SQL
 
 inherit
-	CMS_STORAGE
-
-	CMS_STORAGE_SQL_I
+	CMS_STORAGE_SQL
 
 feature {NONE} -- Initialization
 
@@ -25,7 +22,6 @@ feature {NONE} -- Initialization
 			create {DATABASE_HANDLER_IMPL} db_handler.make (a_connection)
 
 			create error_handler.make
---			error_handler.add_synchronization (db_handler.database_error_handler)
 		end
 
 feature -- Status report

library/persistence/implementation/store/cms_storage_store_sql_builder.e

@@ -0,0 +1,16 @@
+note
+	description: "[
+			Common ancestor for builders responsible to instantiate storage based
+			on Eiffel Store storage.
+		]"
+	author: "$Author: jfiat $"
+	date: "$Date: 2015-02-13 13:08:13 +0100 (ven., 13 févr. 2015) $"
+	revision: "$Revision: 96616 $"
+
+deferred class
+	CMS_STORAGE_STORE_SQL_BUILDER
+
+inherit
+	CMS_STORAGE_SQL_BUILDER
+
+end