added first test and it passes will check for errors
made it so my test is in context
added the 3 let to board so I can text board
wrote test for the length of board in the board class
made the test for board pass
added the code to pass the test board is now an array
added test for previous_board to be empty
wrote the code to make the board previous_board to pass and fixed previous_board test
added to code to pass the test and added another test to double check the answer
added the test for find_col
added the method find_col to make the test pass
added a test to be sure that the original test is correct
added test for finding the box with the given index
added the find_box method to pass the test
Merge pull request #5 from kma3a/board

Board