Reorganising the order of ceremonies in boot.js

With a view to making it all a bit more readable
Further rearrangements of boot.js

Getting better..
More tidying up of boot.js
Further refactorings of boot.js
Stop using 'wiki' directory within wiki directories
Docs update
Rearranging boot.js
Belatedly move tw2 edition system tiddlers to the right place
Stop using the term "bundle" to describe plugins
Refactor loadTiddlersFromPath to return path information for each tiddler
Start using term shadow tiddlers for tiddlers from plugins
On the server, start registering information about each writable tiddler file
Don't track file information for externally loaded tiddlers
Show affected filepaths on the server

Preparatory to doing file sync on the server
Ensure we don't register file information for externally loaded tiddlers

Also make sure some globals like setInterval are available on the server
Make some of the sync adaptor methods be optional
Docs update
Add a file system sync adaptor for the server

It's going to save tiddler changes to the file system
Clearer logging preparatory to implementing file synchronisation
A test image for the clientserver edition