Changed Config behaviour.

Config is no longer singleton. Added path creation to IO class.
Added localization.

Added localization class and initial English localization strings. Minor
changes otherwise.
Remove useless strings.

Removed strings not needed anymore.
Renamed API to MAL.

Renamed the rather ambiguous name "API" to "MAL".
Add Anime class.

Added the newly created Anime class. Some localization. Tests in
MALBot.lua.
Add List class.

Added the List class since I need to change how the anime_list is going
to work. Hurghh!