[Users] mount ploop image from read-only fs

[Roman Haefeli]

Hi Pavel

On Mon, 2014-09-15 at 14:49 +0400, Pavel Odintsov wrote:
> I found bug! Thx Maxim Patlasov for helping with ploop v1 BAT format.
> 
> Please check version from git and it support ploop v1 and v2 correctly :)

I confirm it is working for both ploop layouts. Thanks a lot for fixing
it. 

Roman