There are still some warnings about making functions in a loop, but
I’ll fix those as a separate pull request because the fixes are more
than typographic errors.
At this point we respect any permalink at startup, but we don’t yet
dynamically update the permalink, nor do we respond to ongoing
permalink changes.
The permalink separator being `%00` seems like it might be a bit
controversial. It buys us not having to wrap tiddler titles in double
square brackets if they contain spaces.
Another thing is that this scheme doesn’t support tiddler filters; the
plan is to support them like this:
http://tiddlywiki.com/#!Target%00%00[tag[task]sort[created]]
