Added weight into to the CMS_LINK and provide a `sort' feature for CMS_MENU and related.

Protected cms service from registering many time the same module type.
Moved library/persistence/implementation/* under library/persistence/.
Moved site/www/themes to site/themes
For SQLite storage driver, auto create sqlite db file using associated sql script (to be completed).
Added code in demo module to reuse storage for module purpose.
Always call sql_post_execution in sql_query and sql_change, and not anymore by the callers.
Removed is_web and is_html from {CMS_SETUP}, it was not used.
Reused SHARED_*_ENCODER in CMS_ENCODERS
Added CMS_API.logger rather than using directly the SHARED_LOGGER.log ...
Centralize the implementation of current_user in CMS_REQUEST_UTIL
Removed the inheritance on WSF_FILTER for node handlers, since it is useless and unused.
Added CMS_NODE_API and CMS_USER_API
Prefix html id for block generated html items with "block-", to avoid css name conflict on "main", "content" or similar.
Code cleaning

src/persistence/user/cms_user_storage_sql.e

@@ -1,8 +1,8 @@
 note
 	description: "Summary description for {CMS_USER_STORAGE_SQL}."
 	author: ""
-	date: "$Date: 2015-01-27 19:15:02 +0100 (mar., 27 janv. 2015) $"
-	revision: "$Revision: 96542 $"
+	date: "$Date: 2015-02-13 13:08:13 +0100 (ven., 13 févr. 2015) $"
+	revision: "$Revision: 96616 $"
 
 deferred class
 	CMS_USER_STORAGE_SQL
@@ -34,7 +34,6 @@ feature -- Access: user
 			if sql_rows_count = 1 then
 				Result := sql_read_integer_32 (1)
 			end
-			sql_post_execution
 		end
 
 	users: LIST [CMS_USER]
@@ -46,7 +45,6 @@ feature -- Access: user
 
 			from
 				sql_query (select_users, Void)
-				sql_post_execution
 				sql_start
 			until
 				sql_after
@@ -56,7 +54,6 @@ feature -- Access: user
 				end
 				sql_forth
 			end
-			sql_post_execution
 		end
 
 	user_by_id (a_id: like {CMS_USER}.id): detachable CMS_USER
@@ -74,7 +71,6 @@ feature -- Access: user
 			else
 				check no_more_than_one: sql_rows_count = 0 end
 			end
-			sql_post_execution
 		end
 
 	user_by_name (a_name: like {CMS_USER}.name): detachable CMS_USER
@@ -92,7 +88,6 @@ feature -- Access: user
 			else
 				check no_more_than_one: sql_rows_count = 0 end
 			end
-			sql_post_execution
 		end
 
 	user_by_email (a_email: like {CMS_USER}.email): detachable CMS_USER
@@ -110,7 +105,6 @@ feature -- Access: user
 			else
 				check no_more_than_one: sql_rows_count = 0 end
 			end
-			sql_post_execution
 		end
 
 	is_valid_credential (l_auth_login, l_auth_password: READABLE_STRING_32): BOOLEAN
@@ -163,10 +157,8 @@ feature -- Change: user
 				l_parameters.put (create {DATE_TIME}.make_now_utc, "created")
 
 				sql_change (sql_insert_user, l_parameters)
-				sql_post_execution
 				if not error_handler.has_error then
 					a_user.set_id (last_inserted_user_id)
-					sql_post_execution
 				end
 				sql_commit_transaction
 			else
@@ -207,7 +199,6 @@ feature -- Change: user
 				l_parameters.put (create {DATE_TIME}.make_now_utc, "changed")
 
 				sql_change (sql_update_user, l_parameters)
-				sql_post_execution
 			else
 					-- set error
 				error_handler.add_custom_error (-1, "bad request" , "Missing password or email")
@@ -251,7 +242,6 @@ feature {NONE} -- Implementation
 					Result := l_salt
 				end
 			end
-			sql_post_execution
 		end
 
 	fetch_user: detachable CMS_USER
@@ -297,7 +287,6 @@ feature {NONE} -- Implementation
 			if sql_rows_count = 1 then
 				Result := sql_read_integer_64 (1)
 			end
-			sql_post_execution
 		end
 
 feature {NONE} -- Sql Queries: USER