Import BMML files from Balsamiq mockup software

[Google Code Exporter]

A potential client has sent me some BMML files that were delivered to him. 

It would be nice for pencil to be able to import these files. 

The markup language is XML and (partly) documented  here : 
http://support.balsamiq.com/customer/portal/articles/111834

Or is there a standard markup language that I could suggest balsamiq to include 
in their exports ? 

I'm hoping that users have the freedom to migrate from balsamiq to an 
opensource solution. 

Original issue reported on code.google.com by [e-mail] on 14 Oct 2013 at 9:15