[Scribus] was color management, now optimized pdf

[Craig Ringer]

> If a PDF is or is not "Optimized" has no bearing on the quality, fitness
> for printing or compression of the file. Basically, unless you are
> creating docs with dozens of pages per file and you intend to host them
> on a high traffic server, ignore this.

If you /do/ need to linearize PDFs, you can do this after they're 
exported from Scribus using 'pdfopt' from GhostScript.

Craig Ringer