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/model/src/link/cms_local_link.e

@@ -28,12 +28,8 @@ feature {NONE} -- Initialization
 	make (a_title: detachable like title; a_location: like location)
 			-- Create current local link with optional title `a_title' and location `a_location'.
 		do
-			if a_title /= Void then
-				title := a_title
-			else
-				title := a_location
-			end
 			location := a_location
+			set_title (a_title)
 		end
 
 feature -- Access
@@ -75,6 +71,16 @@ feature -- Status report
 
 feature -- Element change
 
+	set_title (a_title: detachable like title)
+			-- Set `title' to `a_title' or `location'.
+		do
+			if a_title /= Void then
+				title := a_title
+			else
+				title := location
+			end
+		end
+
 	add_link (lnk: CMS_LINK)
 			-- <Precursor>
 		local