Added recent_changes module.

Revisited hooks management, and added new CMS_HOOK_MANAGER.
Added admin, and other link into navigation menu that goes into first sidebar.
Fixed theme info, and template for sidebar ids.
Better css class name for cms node content.

modules/recent_changes/cms_recent_changes_hook.e

@@ -0,0 +1,20 @@
+note
+	description: "Hook provided by module {CMS_RECENT_CHANGES_MODULE}."
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	CMS_RECENT_CHANGES_HOOK
+
+inherit
+	CMS_HOOK
+
+feature -- Invocation
+
+	populate_recent_changes (a_changes: CMS_RECENT_CHANGE_CONTAINER; a_sources: LIST [READABLE_STRING_8])
+			-- Populate recent changes inside `a_changes' according to associated parameters.
+			-- Also provide sources of information.
+		deferred
+		end
+
+end