Minor tweaks to getTiddlers
Rename "shadow" tiddlers to "system" tiddlers

What we have at the moment isn't really the same as TiddlyWiki
classic's shadow tiddlers, it's a much simpler system for excluding
tiddlers. We'll use the term "shadow" instead to refer to the way that
tiddlers in plugins behave, which is exactly like TiddlyWiki classic's
shadow tiddlers.
Refactored wiki event mechanism to support multiple event types
Use the wiki event mechanism to dispatch lazyLoad notifications to syncers

We're trying to get to the point where wiki.js doesn't know about
syncers
Remove invokeSyncers() method from wiki.js
Remove initSyncers() from wiki.js
Use "self" rather than "me" for consistency
Correct comment
Started refactoring TiddlyWeb syncer into generic syncer + TiddlyWeb adaptor

The refactored plugin is `tiddlyweb2` for the moment. The idea is to be
able to use the same syncer with a different adaptor for syncing
changes to the local file system.
Marginally improve the elegance of the simple HTTP server
Fixed erroneous template
Use the newly refactored syncer in favour of the old tiddlyweb code
Use the newly refactored syncer in favour of the old tiddlyweb code
Get rid of the support for old-style syncers
Fix inclusion of revision field when getting a tiddler
Fix revision handling
Switch "userName" to "username"

Because the former is naff
Fixes to ensure revision field is always a string

TiddlyWeb returns it as a number, which seems like it might be an
accident.
Docs update
Disable password autocomplete

It doesn't seem to work properly.