Include Paulo Moura's Logtalk OO LP system

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@53 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

Logtalk/examples/roots/nil.lgt

@@ -0,0 +1,16 @@
+
+:- object(nil,
+	instantiates(object)).
+
+
+	:- info([
+		version is 1.0,
+		date is 2000/7/24,
+		authors is 'Paulo Moura',
+		comment is 'Used to represent a void reference.']).
+
+
+	nil.
+
+
+:- end_object.