Submitting Dslide to Non-GNU ELPA

[Psionic K <psionik@positron.solutions>]

Dslide, a re-write of org-tree-slide focusing on programmable
presentations, is approaching 1.0.  Release notes (0.5.2) here:
https://github.com/positron-solutions/dslide/releases

I want to go through the Non-GNU ELPA process, partly to make the
package as available as possible, and partly for whatever coincidental
quality gains result from the submission process.

I have not done anything with Non-GNU ELPA yet.  Please advise.

Source available here:  git@github.com:positron-solutions/dslide.git
Direct github link:  https://github.com/positron-solutions/dslide
4m video demo for 0.5.1 https://youtu.be/8vkymxjSrK0

I was going to just add some features to org-tree-slide but realized
it could do so much more with Elisp integration in order to program
actions into the presentations.  So it's a nearly full re-write, at
least 90%.  License is GPL3.  Source history descends from
org-tree-slide.

For an overview of markup and capabilities, the org document which is
used both for testing and demonstration, can be viewed here:
https://raw.githubusercontent.com/positron-solutions/dslide/master/test/demo.org