[Qemu-block] interactive qemu-img

[Programmingkid]

I thought of a way to make qemu-img much more user-friendly. When the user 
opens qemu-img without any arguments, we could present a prompt that guides the 
user on making an image file.

This illustrates what I think should happen.

<after user double-clicks on qemu-img...>

Please select a format (qcow, qcow2, raw, vdi, vhdx, vmdk, vpc, vvfat):
qcow2

Please enter a size (e.g. 100M, 10G):
4G

Please enter a name: 
WinXP.qcow2

Creating image file...done


The interactive prompt would contain enough options to make a usable image 
file. If the user wants to use some of the more advanced features of qemu-img 
he or she would still need to use the command-line.

Would such a patch be welcomed?