Put kana readings first.

As done in other dictionaries. Much easier to read.
Fix provisional confitional inflection.
Improve style.
Fix volitional inflection.
Allow to do quick experiments with a subset of the dictionary.
Add more negative inflections.
Several inflection fixes/improvements.

- fix vk, vs
- potential
- ra conditional
Don't desambiguate homonyms.

Recent Kindle firmware handles homonyms much better.
Add screenshot.