Valid move missing for self.get_moves() about chessnut

[BastiTee]

Okay, I've found the problem. It happens during the evaluation if a possible move is a castle out of the check. At this point it is not verified if the move involves the king at all. e2g1 is therefore evaluated as if the king moved e1g1. Fixed on my pull request.

[cgearhart]

Nice work. Let me verify tonight & I'll merge the fix.

[cgearhart]

I merged the pull request with the fix & then noticed that the test could be simplified & more efficiently conducted by splitting the conditional. Those changes were included in the push to fix issue 10.

It currently passes all of the unit tests (including a new one for this issue), but I'll wait to see if you have any comments before I uprev the library release in the pypi package.

Thanks again.

[BastiTee]

I ran the new code on my data and I got nothing. Thanks!