Fix bug where `shell` is not imported, and add links to github repo
Fix bug where `shell` is not imported, and add links to github repo

gfpacheco/Nativefier,zucher/nativefier,pixel9/nativefier,gfpacheco/Nativefier,skewedlines/Nativefier,faceair/nativefier-slack,zucher/nativefier,pixel9/nativefier,jiahaog/Nativefier,skewedlines/Nativefier,jiahaog/Nativefier,pixel9/nativefier,skewedlines/Nativefier,faceair/nativefier-slack,zucher/nativefier,jiahaog/Nativefier,gfpacheco/Nativefier