no flag behavior

[maackle]

Purely opinion but I'd like to see it handle a no-flag argument as the image

$ honeybii image.png

Instead of

$ honeybii -i image.png

[jameynakama]

I think so too and actually set it up this way to begin with. But I ran into headaches around optparse not handling positional args. I'll consider getting this back in though... I agree it's more idiomatic.