Closes GH Issue #766, partially closes#520
Prior to this release, no other subscriptions would download if a subscription before it had an error. Now, subscriptions will continue to download even if one has an error, and will be reported in the output summary.
The only required field in a config was `working_directory`. This is now optional (defaults to `.ytdl-sub-working-directory`) making it so a config is no longer required. This sets the stage to onboard noob users who will solely use prebuilt presets in a single subscription file
* post only if > 0
* since todays date
* pypi workflow
* test token
* fix test
* long description
* simpler names
* more simple
* no test pypi in master
* publish only on master
* [BACKEND] Set python __version__ as date, dynamically update it in make
* set version dynamically
* keep empty
* git ignore __init__
* keep init
* keep
* fix unit test
