Add a .gitignore.
Add a .gitignore.

brendan-ward/rasterio,kapadia/rasterio,njwilson23/rasterio,clembou/rasterio,brendan-ward/rasterio,clembou/rasterio,kapadia/rasterio,clembou/rasterio,perrygeo/rasterio,perrygeo/rasterio,njwilson23/rasterio,kapadia/rasterio,perrygeo/rasterio,brendan-ward/rasterio,njwilson23/rasterio