(m) change spacing, use new method name
winner? method with check_rows_for_winner and chaeck_columns_for_winner
methods, with tests.  Slanty wins yet to come!
winner? now checks for slanty wins.  (There has to be a better way to
say that.)
updated TODOs
Merge pull request #5 from cowmanifestation/master

winner? method
get rid of merge conflicts