#77 Get rid of useless furigana.js

Before: we produced kanji[reading] formatted transcriptions,
        and converted them to ruby HTML tags using javascript.
Now: we use [kanji|reading] formatted transcriptions, and convert
     them to ruby HTML on server-side, using a view helper.
 #77 Avoid producing empty furiganas.
 #77 Display transcriptions from database.

Instead of autogenerated transcriptions.