More changes

Getting closer to a full Twine 1.4 release...

What's left to do:

* Reinstate a proper version of <<textentry>>
* Maybe draw passages' tags on their widgets?
* Fix Jonah some more so that either A: all links are one-use only, or B: using prior passage links rewinds the story to there. I'm favouring the latter.
* Maybe try and upgrade some of my own macros for inclusion. Maybe. Maybe not.
* Bite the bombshell and put in some link-and-set syntax, I guess. Everyone wants it.
* Check that <<remember>> is still working.