[Cin] sequential rendering of multiple projects

[Andrea paz]

> Thank you Phyllis! I have not figured it out yet, but I will definitely
> figure it out.
I recommend you read the entire "Batch rendering" guide starting from
7.3 (or 7.2 if you have an older version of the manual). Once you've
created and saved the "listjobs", you can start rendering right away
or exit CinGG and start it from the command line or put it in a script
or crontab, etc.
See also an interesting discussion on MantisBT:
https://www.cinelerra-gg.org/bugtracker/view.php?id=315