Fix #448 - Add offline build detection and advice (#452)
Fix #448 - Add offline build detection and advice (#452)


gfpacheco/Nativefier,skewedlines/Nativefier,skewedlines/Nativefier,gfpacheco/Nativefier,skewedlines/Nativefier,jiahaog/Nativefier,jiahaog/Nativefier,jiahaog/Nativefier,gfpacheco/Nativefier