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

examples/peacekeeping/english/Peace_Eng.gf

@@ -0,0 +1,10 @@
+--# -path=.:..:present:prelude
+
+concrete Peace_Eng of Peace = 
+  PeaceSyntax_Eng, PeaceLexCommon_Eng, 
+  PeaceLexExt_Eng, PeacePhrases_Eng
+  ** {
+
+  flags startcat = PhraseWritten ; 
+
+}