TW5 sync adapter plugin which stores tiddlers in a hierarchical file system
using subfolders according to hierarchical titles of the tiddlers. Understands
the concept of system tiddlers based on titles beginning with $:/ and
stores these tiddlers under a dedicated "system" folder inside the tiddler
directory hierarchy. Also understands draft tiddlers and stores them flat
inside a special ".drafts" folder. Code bases on the existing filesystem
sync adapter of TW5, which has been enhanced to work with structured
folder hierarchies and draft tiddlers.