Merge pull request #10 from brandon-rhodes/master

March 6th work
Started working on in_check()

ended without completing the code
More work on in_check()

I did what I think should be about right but I am getting an error when
I am asking it to check if an item is in the set o valid moves.
in check()

I think it is all logicked out but i still cut figure out the error it
is getting from the line that says
if square in thing:
I also can't figure out how to install pygame.
in_check

I solved one of the issues that I had. Now I need to get the method
that returns the king's location to return it correctly. It needs to be
reversed.
How to fetch piece and color by square, not xy