Example from README not functional for big files

[pitchforks]

Doing read() on a big file containing many PGN games (think hundreds of megabytes and more) takes a very long time and eats up lots of memory.

Doing pgn.loads() on a big string is even worse because there's the risk of completely running out of memory.

[vakoneru]

The example in the README for pgn.GameIterator is still not functional - running it with any pgn results in an error:

AttributeError: 'module' object has no attribute 'GameIterator'

[mtesluk]

You forgot to update lib on pypi