Re: Maxima inline plots

Dear Marduk,

Thanks a lot for the ps_plot2d function:
http://lists.gnu.org/archive/html/texmacs-dev/2017-09/msg00002.html

Here is a pull request based on part of your code, slightly modified.
https://github.com/texmacs/texmacs/pull/30
That should make the reviewing process easier.

The changes to maxima-menus.scm and my-init-texmacs.scm
were not obvious to me, so left aside.
Someone else with a better understanding of texmacs,
and a similar workflow as yours,
will have to review it.

Ederag