Updated CMS:

Extract email service as a library.
Updated modules to use the email library.
Fixed compilation issue with database_connection_null.e

library/email/email_service_parameters.e

@@ -0,0 +1,20 @@
+note
+	description: "Basic Email Service customized for cms site"
+	author: ""
+	date: "$Date: 2015-01-16 07:17:14 -0300 (vi. 16 de ene. de 2015) $"
+	revision: "$Revision: 96467 $"
+
+deferred class
+	EMAIL_SERVICE_PARAMETERS
+
+feature	-- Access
+
+	smtp_server: IMMUTABLE_STRING_8
+		deferred
+		end
+
+	admin_email: IMMUTABLE_STRING_8
+		deferred
+		end
+
+end