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.

src/persistence/sql/cms_storage_sql_builder.e

@@ -0,0 +1,85 @@
+note
+	description: "[
+			Common ancestor for builders responsible to instantiate storage based
+			on SQL statement storage.
+		]"
+	author: "$Author: jfiat $"
+	date: "$Date: 2015-01-27 19:15:02 +0100 (mar., 27 janv. 2015) $"
+	revision: "$Revision: 96542 $"
+
+deferred class
+	CMS_STORAGE_SQL_BUILDER
+
+inherit
+	CMS_STORAGE_BUILDER
+
+feature -- Initialization
+
+	initialize (a_setup: CMS_SETUP; a_storage: CMS_STORAGE_SQL)
+		local
+			u: CMS_USER
+			l_anonymous_role, l_authenticated_role, r: CMS_USER_ROLE
+			l_roles: LIST [CMS_USER_ROLE]
+		do
+				--| Schema
+			a_storage.sql_execute_file_script (a_setup.environment.path.extended ("scripts").extended ("core.sql"))
+			a_storage.sql_execute_file_script (a_setup.environment.path.extended ("scripts").extended ("user.sql"))
+
+				--| Roles
+			create l_anonymous_role.make ("anonymous")
+			a_storage.save_user_role (l_anonymous_role)
+
+			create l_authenticated_role.make ("authenticated")
+			a_storage.save_user_role (l_authenticated_role)
+
+				--| Users
+			create u.make ("admin")
+			u.set_password ("istrator#")
+			u.set_email (a_setup.site_email)
+			a_storage.new_user (u)
+
+				--| Node			
+				-- FIXME: move that initialization to node module
+			l_anonymous_role.add_permission ("view any page")
+			a_storage.save_user_role (l_anonymous_role)
+
+			l_authenticated_role.add_permission ("create page")
+			l_authenticated_role.add_permission ("view any page")
+			l_authenticated_role.add_permission ("edit any page")
+			l_authenticated_role.add_permission ("delete page")
+			l_authenticated_role.add_permission ("view own page")
+			l_authenticated_role.add_permission ("edit own page")
+			l_authenticated_role.add_permission ("delete own page")
+			a_storage.save_user_role (l_authenticated_role)
+
+
+			--|-------------------------------------------|--
+			--| For testing purpose, to be removed later. |--
+			--|-------------------------------------------|--
+
+				-- Roles, view role for testing.
+			create r.make ("view")
+			r.add_permission ("view any page")
+			a_storage.save_user_role (r)
+
+			create {ARRAYED_LIST [CMS_USER_ROLE]} l_roles.make (1)
+			l_roles.force (r)
+
+			create u.make ("auth")
+			u.set_password ("enticated#")
+			u.set_email (a_setup.site_email)
+			a_storage.new_user (u)
+
+			create u.make ("test")
+			u.set_password ("test#")
+			u.set_email (a_setup.site_email)
+			a_storage.new_user (u)
+
+			create u.make ("view")
+			u.set_password ("only#")
+			u.set_email (a_setup.site_email)
+			u.set_roles (l_roles)
+			a_storage.new_user (u)
+		end
+
+end