Remove executable bit from everything

Signed-off-by: Ricky Elrod <ricky@elrod.me>
isLeft is in Data.Either nowadays

Signed-off-by: Ricky Elrod <ricky@elrod.me>
Use . instead of space for blank square, like gnuchess

Signed-off-by: Ricky Elrod <ricky@elrod.me>
Merge pull request #1 from relrod/fixes

Thanks Ricky. I'll bump the version and upload the new version to hackage later today.

I do hope no one relies on the output being formatted with spaces... If they do, they're probably doing it wrong, so let's not worry about that ;-).