Added support for base_url (i.e the CMS can be hosted on the root, or sub folder).

Local paths are relative to cms site url (i.e no starting slash).
Favor CMS_RESPONSE.absolute_url and url .. instead of using directly WSF_REQUEST.absolute_script_url and script_url.
Handled unicode truncation issue for logger.
Code cleaning.

src/persistence/core/cms_core_storage_i.e

@@ -1,6 +1,6 @@
 note
 	description: "[
-			Objects that ...
+			CMS Storage for core functionalities.
 		]"
 	author: "$Author$"
 	date: "$Date$"