Move the pure radical shapes to the correct edges

To fix #88.

I went through those characters we have with “radical” in the “official” unicode character name, and moved those that are pure radicals. (I mean those that are special radical variant of a “normal” kanji, like 「艹」 for 「艸」, 「⺖」 for 「心」, or those radicals where there isn’t (afaik) a kanji for it, like 「阝」.)

Those usually only appear close to one edge, and most fonts put those radicals close to that edge. That’s what i did here.

(For #88 i mentioned only three of the four edges, 「艹」, 「彳」, 「刂」. Now i came along one i moved to the bottom, 「灬」.)

The original issue isn’t necessarily an error, so maybe people think it should stay the old way. Some fonts seem to have these (or some of these) shapes centered like KanjiVG without this commit. Because of this i don’t just pull this myself.