Updated API documentation to be closer to current Danbooru API.
Updated API documentation to be closer to current Danbooru API.

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branch : 2.3-stable

nanaya/moebooru,moebooru/moebooru,euank/moebooru-thin,moebooru/moebooru,nanaya/moebooru,moebooru/moebooru,nanaya/moebooru,moebooru/moebooru,euank/moebooru-thin,nanaya/moebooru,moebooru/moebooru,euank/moebooru-thin,nanaya/moebooru,euank/moebooru-thin,euank/moebooru-thin