Avoid "fork" wording

Our reasoning at Hangout #55 was that TiddlyWiki needs to present
itself as a consumer product, and that ordinary consumers were likely
to be confused by the “Fork me” wording.
Remove broken info tiddlers

We can’t currently detect TiddlyFox or TiddlyDesktop so we’’ll remove
the corresponding info tiddlers and documentation
Fix typo
Add version number to one-shot upgrading UI
Fix checkbox widget to work with missing tiddlers
Add support for permalink and permaview
Docs for permalink and permaview
Add permalink/permaview/clone to tiddler info bar

I’m open to suggestions for better ways to expose this functionality