-cmdTypeOf :: String -> Maybe CommandType
-cmdTypeOf "br" = Just InlineCommandType
-cmdTypeOf "i" = Just InlineCommandType
-cmdTypeOf "b" = Just InlineCommandType
-cmdTypeOf "span" = Just InlineCommandType
-cmdTypeOf "div" = Just BlockCommandType
-cmdTypeOf _ = Nothing
-
-
-parseWiki :: String -> Either String WikiPage