Ok, it's done!
To open a window i fullscreen you can give (optionally) the fullscreen flag like this:
open window 100,100,fullscreen
Note that you can still give the usual open window command so no code broken

.
If you want to get the actual window size just do:
width = peek("winwidth")
height = peek("winheight")
The new version is, as usual,
here. It has today's date on it.
You may notice that the filesize is kind of big, it's because of git (the version manager I'm using) every change from 2.763 is avaiable so it occupies some space. I'll do something about that tomorrow. Also need to update the site.
Best Regards,
PSnake