Added peacekeeping example back in. Doesn't compile yet.

examples/peacekeeping/PeaceCatI.gf

@@ -0,0 +1,22 @@
+incomplete concrete PeaceCatI of PeaceCat = 
+  Cat ** open Lang, PeaceRes, Prelude in {
+
+  lincat
+    MassN = N ;
+    Phrase = { s : Str; p : Punct } ;
+    PhraseWritten = { s : Str } ;
+    PhraseSpoken = { s : Str } ;
+
+  lin 
+    Written x = mkWritten x.s x.p ;
+    Spoken x = { s = x.s } ;
+
+  oper
+    mkWritten : Str -> Punct -> { s : Str } ;
+    mkWritten x p = case p of {
+      FullStop => { s = x ++ "." } ; --TFullStop (ss s) TEmpty ;
+      QuestMark => { s = x ++ "?" } ; --TQuestMark (ss s) TEmpty ;
+      ExclMark => { s = x ++ "!" } --TExclMark (ss s) TEmpty 
+    } ;
+
+}