printing errors the right way
Divided sync into smaller functions
sync now depends on a file with a list of links
Using download links to tell which entries are new for us
will_tag(), edit()

will_tag() now uses retrieve_config().
I have fixed edit(): now "date_info" is actually written
Added firstsync option
The README now reflects some changes made elsewhere.
The "Downloading... " message is now more informative.
Many things.
Refactored functions to use dict instead of argparse namespaces.
Completed work on the move to individual feed files.
Added a bunch of sanity checks.
Updating the README
Merge branch 'master' into development-main
Some refactoring in the move from namespaces to dicts