Remap sitelen pona pona to the accepted UCSUR sitelen pona proposal

[coolreader18]

Resolves #9. c.f. https://www.kreativekorp.com/ucsur/charts/sitelen.html

Couple things about what I did:

1. I removed the unicode codepoints for tp_space and tp_combine, since they
   don't have direct counterparts in the UCSUR proposal, and seem like
   implementation details of the combining/word-splitting system. (the proposal
   does have SITELEN PONA {STACKING,SCALING} JOINER but those are more
   specific, and it recommends using a normal ZWJ for combining ideographs.
   since ideograph combining seems kinda wip(?) I decided to just leave it
   as-is.)
2. Reordered the table of unicode glyphs according to the new codepoints (the
   non-pu words are the only ones that have a different order), as well as the
   16px all-glyphs example. LMK if that's something you'd rather I revert, I
   just did it cause they were previously ordered in the previous codepoint
   order.

Also, I'm not sure why, but I think some of the glyphs might have changed verrrrry slightly. Maybe just fontforge upgrading them or something? idk, I could only notice when tabbing back and forth between the old version of the page and the new one.