food grammars added, with copyright statements

contrib/summerschool/foods/FoodsSwe.gf

@@ -0,0 +1,7 @@
+--# -path=.:present
+
+-- (c) 2009 Aarne Ranta under LGPL
+
+concrete FoodsSwe of Foods = FoodsI with 
+  (Syntax = SyntaxSwe),
+  (LexFoods = LexFoodsSwe) ;