support path generation based on published_at

[autonome]

The README shows how path generation will happen automatically without published_at in various ways.

I want the opposite :)

I'd like to have my posts directory be just folders named based on title and then have the site dir generate proper date-based path structure from published_at metadata.

This means that when I'm authoring, I don't have to care about all these directories, can just focus on writing. If I'm late by a day, whatevs, don't have to worry about recreating all the paths, links, etc.

[autonome]

looks like maybe this would be done in urlFor() in config-shim.js...

[autonome]

nope, is elsewhere...