Remove some extras from .gitignore
Remove some extras from .gitignore

grenzi/cookiecutter-data-science,uberwach/cookiecutter-kaggle,ScottSnapperLab/cookiecutter-data-science,mnarayan/cookiecutter-data-science,drivendata/cookiecutter-data-science,ScottSnapperLab/cookiecutter-data-science,drivendata/cookiecutter-data-science,ScottSnapperLab/cookiecutter-data-science