added gitignore file, we can put data in the data folder, however, it shouldn't be checked in until we are finalizing the dataset
added gitignore file, we can put data in the data folder, however, it shouldn't be checked in until we are finalizing the dataset

nebgnahz/CS281A,nebgnahz/CS281A,nebgnahz/CS281A,nebgnahz/CS281A,nebgnahz/CS281A