[Add instances for ExecMode and OutputMode
Joachim Breitner <mail@joachim-breitner.de>**20100728161814
 Ignore-this: fd3cab4fa8dd43814035bf45523e1b46
] hunk ./SemSyn.hs 42
+    deriving (Eq, Read, Show)
hunk ./SemSyn.hs 45
+    deriving (Eq, Read, Show)