add option to import program list from extern (for autocomplete)

[ColdIV]

scm should take a list from an url (or file) to load and allow autocomplete from
this would have the advantage, that you can maintain your own list of programs and libraries without having to put them all in the same git repository.
(could easily work with a bunch of pastebin scripts)

[ColdIV]

I think this might be a good idea in general, having a file to list all programs and libraries for autocomplete.
We could add a file like that to a repository and exclude test and work in progress libraries, so that every program in SCMs autocomplete works and serves a purpose.
And if we need a program to be included we can just link to a different autocomplete list.

This would also have the advantage that we could remove the -prog and -lib suffixes.
If needed, we could even add the option to mark programs / libraries as "testing" or "in development" and have an option in scm to show those as well.

What do you think @ChristophLHR ?