Switch download-test_readline to ruby script

[MSP-Greg]

Instead of using platform specific scripts to download readline test files from ruby/ruby, use a Ruby script.

Didn't go crazy with error checking, as GitHub connecting to GitHub should be reliable. It does fail when a file does not exist (response.message != 'OK').

More changes are coming to using Ruby on Actions, and a cross platform script will be helpful.

[MSP-Greg]

When removing appveyor.yml files, it may fail, as AppVeyor can be configured to run default scripts if no yml file is present.

If one checks the AppVeyor settings page for the project, the 'left side' menu's bottom option is 'Delete project'. That's the easy way.

Otherwise, the menu options 'Build', 'Test', & 'Deployment' items all have options that should be set to 'Off'. I think doing that will not run any CI, but I'm not sure...

[nobu]

It seems a good idea to manage the list in one place.

[aycabta]

Thank you for fixing. I think "Delete AppVeyor & Travis" should be separated. Would you split the commit to another Pull Request?

[MSP-Greg]

Thank you for fixing. I think "Delete AppVeyor & Travis" should be separated. Would you split the commit to another Pull Request?

Thank you. Done, see PR #128.

[MSP-Greg]

@aycabta

Thanks. I realized last night while AFK that the code may not be thread safe with the handling of the file info array/matrix. If so, I'll do a PR...

[aycabta]

All the discussions ware great. And thank you so much for your careful consideration. Your way what you did covers where I couldn't find problems.

the code may not be thread safe with the handling of the file info array/matrix.

You're always welcome!

[MSP-Greg]

Thanks, I'm glad I could help. Thank you for reline, as it's a big improvement for Windows Ruby.