Add .gitignore and README.md when the repo is brand new. (#1270)
Add .gitignore and README.md when the repo is brand new. (#1270)


googledatalab/datalab,googledatalab/datalab,craigcitro/datalab,googledatalab/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,parthea/datalab,googledatalab/datalab,yebrahim/datalab,craigcitro/datalab,craigcitro/datalab,parthea/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,yebrahim/datalab,craigcitro/datalab,parthea/datalab,yebrahim/datalab,parthea/datalab,craigcitro/datalab