This change is likely to break most existing scripts that call
TiddlyWiki.
TL;DR - output paths are now relative to the editions/output folder,
rather than to the current folder
See [[Notes for upgrading to 5.0.11-beta]] for details.
We’re introducing a mechanism that allows us to decide which tiddlers
get saved. Using `$:/core/save/all` gives all tiddlers, as before.
Using `$:/core/save/empty` gives an empty wiki. Saving an empty wiki
from tw5.com isn’t the same as the empty wiki cooked from
editions/empty because the two editions have different plugins and
other system tiddlers.