Add example to readme for ignoring multiple folders
Add example to readme for ignoring multiple folders

zucher/nativefier,jiahaog/Nativefier,malept/electron-packager,KaleoSoftware/Kaleofier,Ivshti/electron-packager,Rameshv/electron-packager,pixel9/nativefier,zucher/nativefier,jlord/electron-packager,sethlu/electron-packager,tengyifei/electron-packager,JamesKyburz/electron-packager,krishnaIndia/electron-packager,zucher/nativefier,faceair/nativefier-slack,sethlu/electron-packager,skewedlines/Nativefier,faceair/nativefier-slack,KaleoSoftware/Kaleofier,quicksnap/electron-packager,electron-userland/electron-packager,kvnneff/electron-packager,electron-userland/electron-packager,malept/electron-packager,Goobaroo/electron-packager,pixel9/nativefier,grofit/electron-packager,skewedlines/Nativefier,spinico/electron-packager,gfpacheco/Nativefier,jiahaog/Nativefier,plrthink/electron-packager,bradparks/electron-packager,mrzmyr/electron-packager,rahatarmanahmed/electron-packager,Zurico/electron-packager,buddingmonkey/electron-packager,gfpacheco/Nativefier,gfpacheco/Nativefier,kfranqueiro/electron-packager,Goobaroo/electron-packager,vevedh/electron-packager,skewedlines/Nativefier,jiahaog/Nativefier,herrmannplatz/electron-packager,maxogden/electron-packager,pixel9/nativefier,liuxiong332/electron-packager,Urucas/electron-packager