started examples-3.0 with examples that are tested to work

examples-3.0/tutorial/hello/HelloFin.gf

@@ -0,0 +1,10 @@
+concrete HelloFin of Hello = {
+
+  lincat Greeting, Recipient = {s : Str} ;
+
+  lin 
+    Hello rec = {s = "terve" ++ rec.s} ;
+    World = {s = "maailma"} ;
+    Mum = {s = "äiti"} ;
+    Friends = {s = "ystävät"} ;
+}