Moved all location related queries into CMS_API, instead of CMS_SETUP.

Note that CMS_SETUP provides locations set by default or from configuration file.
Now theme related resources can be found under site/modules/$mod_name/... or site/themes/$theme/modules/...
  so only theme related resources can be overriden for now.

src/configuration/cms_setup.e

@@ -90,7 +90,10 @@ feature -- Query
 		deferred
 		end
 
-feature -- Access: Theme	
+feature -- Access: Theme
+
+	modules_location: PATH
+			-- Path to modules.	
 
 	themes_location: PATH
 			-- Path to themes.
@@ -98,9 +101,6 @@ feature -- Access: Theme
 	theme_location: PATH
 			-- Path to a active theme.
 
-	theme_assets_location: PATH
-			-- Path to a active theme assets folder.
-
 	theme_information_location: PATH
 			-- Active theme informations.
 		do