ignore sbt build folder (#2851)
ignore sbt build folder (#2851)


danking/hail,danking/hail,hail-is/hail,cseed/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,danking/hail,danking/hail,hail-is/hail,hail-is/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail,cseed/hail