Message2540

I tried running test_zipfile with the 2.3 branch; it failed because you couldn't do '2 << 3L' and you couldn't pass a long integer to the read() method.  These type combinations work in Python 2.3.

The attached patch makes them work.     I suspect many more changes are needed for PyInteger.java to make other operations work with long.

Note that the indentation in the patch is wrong -- I need to configure Emacs properly.  For now I'd just like to know if the approach taken in the patch is correct.