Getting goodies into a *good* state

[jeetelongname]

Hello there, its been a while since I took over the maintenance of elfeed goodies, I should probably explain a little more openly what I plan to do in a nice list

1. Use the standard emacs lisp name space conventions. This is first the standard and second makes finding functions in this package a lot easier. I will be deprecating all of the functions though to make the transition smooth. I may also merge all of the files together and adopt an outline instead as that would be cleaner.
2. Fix any long standing bugs and performance issues, I know of one such issue which causes the first load to be terribly slow. But others are welcome (though do create your own issue for them)
3. Modularise and make parts more configurable. for example being able to add your own columns and stats to the header line, make any user facing constants configurable and so on. This will be the first improvement that is not really technical debt.
4. Anything else! please drop suggestions (or better yet PR's) and ill try to get around to them! thanks for being pacient with me and long live elfeed goodies!

[pymander]

I'm very interested in seeing the date in the header columns. Also, I miss some of the header information from non-goodies elfeed article displays. I like having all of that information available.