mult param bug fix and add an example file

example.py

@@ -0,0 +1,9 @@
+from pyhell import autoenable
+from pyhell.hstypes import HaskellString, HaskellFunction
+from Data.List import sort, take #import from haskell
+
+two = HaskellFunction.from_string("2");
+x = HaskellString(take(two, sort(HaskellString("pyhell"))))
+#just checked the type and build the expression, it had not executed yet
+print("the code", x.hs_code, "was not executed yet, simulating the lazily of Haskell: ", x._data)
+print("now, when 'x' is direct accessed the code was evaluated and the result '", x, "' was cached to next use")