[scribus] Thai support

[Václav Šmilauer]

> If you are using Linux or Mac OS, you can test CTL branch of scribus here
> https://github.com/HOST-Oman/scribus
> It supports Thai very well.
Is CTL the branch Greg&Craig mentioned as the merger for 1.5.3 
supporting south-asian languages? I am asking mainly due to concerns of 
opening files saved with the CTL branch with mainline. If CTL does not 
get merged (soon), I might be stuck with it forever? Or is it compatible 
just alright? Thanks for your work on the CTL branch. I am under Linux, 
the appimage runs fine. Cheers! Vaclav