Julia executable keeps running if TeXmacs is killed

[woutersj]

If TeXmacs is killed or crashes, the Julia executable keeps running and start to consume a lot of CPU. This doesn't seem to happen with other sessions.

[woutersj]

I made a bit of progress on this. It seems to have something to do with the multi-line nature of input to the plugin: commenting out julia-serialize in init-julia.scm and doing just one local code = readline(stdin) at the start of the main loop in TeXmacsJulia.jl (instead of lines 300-313), makes julia exit after TeXmacs is terminated. I'll see if I can get it to work with multi-line input as well.