Alphabets: Add Swedish, correct Japanese and Esperanto

[AjnoEO]

In /data/alphabets.txt

• Removed a double empty string between Bengali and Bopomofo
• Reordered the Esperanto alphabet to be coherent with the other alphabets (capital-small letter pairs rather that all capital letters then all small letters)
• Added five missing kanas in the Japanese hiragana
• Added all missing modified kanas and chōonpu in the Japanese katakana
• Reordered the Japanese katakana to be coherent with the Japanese katakana
• Added the Swedish alphabet In each /loc/<...>/alphabets.txt
• Added the Swedish alphabet with its name (most of them according to Wikipedia)