[scribus] Save As... older Scribus version

[Cezary Grabski]

Hi all,
how to save document for previous version of Scribus?
I test development 1.5svn Scribus and would like to save documents for 1.3.5 
or even 1.3.3 version.
How can I do it?

I notice Scribus file format is based on XML. I think make Scribus writing 
document for lower version or reading from higher version is only make it 
ignoring unknown parameters. 

Cezary Grabski