Implemented taxonomy administration pages

- create term, vocabulary, add or remove term from vocabularies, ...
Fixed content editing related to taxonomy  (especially with multiple terms vs tags).
Fixed various SQL storage issue related to taxonomy and vocabularies.
Added CMS_RESPONSE.wsf_theme as helper.

src/service/cms_api.e

@@ -15,7 +15,7 @@ inherit
 
 	REFACTORING_HELPER
 
-	CMS_ENCODERS
+	CMS_REQUEST_UTIL
 
 create
 	make
@@ -407,7 +407,7 @@ feature {NONE} -- Hooks
 			l_hooks: like hooks
 		do
 			l_hooks := hooks
-			register_hooks (l_hooks)
+			setup_core_hooks (l_hooks)
 			across
 				enabled_modules as ic
 			loop
@@ -436,7 +436,7 @@ feature -- Query: API
 
 feature -- Hooks
 
-	register_hooks (a_hooks: CMS_HOOK_CORE_MANAGER)
+	setup_core_hooks (a_hooks: CMS_HOOK_CORE_MANAGER)
 			-- Register hooks associated with the cms core.
 		do
 			a_hooks.subscribe_to_export_hook (Current)

src/service/response/cms_response.e

@@ -72,7 +72,6 @@ feature {NONE} -- Initialization
 			l_module: CMS_MODULE
 			l_enabled_modules: CMS_MODULE_COLLECTION
 		do
-			api.register_hooks (hooks)
 			l_enabled_modules := api.enabled_modules
 			across
 				l_enabled_modules as ic
@@ -984,6 +983,26 @@ feature -- Theme
 			end
 		end
 
+feature -- Theme helpers
+
+	wsf_theme: WSF_THEME
+			-- WSF Theme from CMS `theme' for Current response.
+		local
+			t: like internal_wsf_theme
+		do
+			t := internal_wsf_theme
+			if t = Void then
+				create {CMS_TO_WSF_THEME} t.make (Current, theme)
+				internal_wsf_theme := t
+			end
+			Result := t
+		end
+
+feature {NONE} -- Theme helpers		
+
+	internal_wsf_theme: detachable WSF_THEME
+			-- Once per object for `wsf_theme'.
+
 feature -- Element Change
 
 	set_status_code (a_status: INTEGER)