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/theme/missing_theme/missing_cms_theme.e

@@ -18,15 +18,19 @@ create
 
 feature {NONE} -- Initialization
 
-	make (a_setup: like setup)
+	make (a_setup: like setup; a_info: like information; abs_site_url: READABLE_STRING_8)
 		do
 			setup := a_setup
+			information := a_info
+			set_site_url (abs_site_url)
 		ensure
 			setup_set: setup = a_setup
 		end
 
 feature -- Access
 
+	information: CMS_THEME_INFORMATION
+
 	name: STRING = "missing theme"
 
 	regions: ARRAY [STRING]