Move libraries layout', model', `peristence' under cms folder

Updated code to the new layout.
Added missing comments.
Remove /example/api

cms/persistence/implementation/common/database/parameter_name_helper.e

@@ -0,0 +1,23 @@
+note
+	description: "Helper for paramenter Names"
+	date: "$Date: 2014-08-20 15:21:15 -0300 (mi., 20 ago. 2014) $"
+	revision: "$Revision: 95678 $"
+
+deferred class
+	PARAMETER_NAME_HELPER
+
+feature -- String
+
+	string_parameter (a_value: STRING; a_length: INTEGER): STRING
+			-- Adjust a parameter `a_value' to the lenght `a_length'.
+		require
+			valid_length: a_length > 0
+		do
+			if a_value.count <= a_length then
+				Result := a_value
+			else
+				create Result.make_from_string (a_value.substring (1, a_length))
+			end
+		end
+
+end