Updated CMS code.

Separated code to have a lib and an example.
Improved design, fixed a few issues related to folder location.

This is still experimental and require more work to be really friendly to use.

draft/application/cms/src/notification/cms_chain_mailer.e

@@ -0,0 +1,58 @@
+note
+	description: "Summary description for {CMS_CHAIN_MAILER}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	CMS_CHAIN_MAILER
+
+inherit
+	CMS_MAILER
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make (a_mailer: like active)
+		do
+			active := a_mailer
+		end
+
+feature -- Access
+
+	active: CMS_MAILER
+
+	next: detachable CMS_MAILER
+
+feature -- Status
+
+	is_available: BOOLEAN
+		do
+			Result := active.is_available
+			if not Result and attached next as l_next then
+				Result := l_next.is_available
+			end
+		end
+
+feature -- Change
+
+	set_next (m: like next)
+		do
+			next := m
+		end
+
+feature -- Basic operation
+
+	process_email (a_email: CMS_EMAIL)
+		do
+			if active.is_available then
+				active.process_email (a_email)
+			end
+			if attached next as l_next and then l_next.is_available then
+				l_next.process_email (a_email)
+			end
+		end
+
+end