Temporary API endpoints :-

/api/size.json				→	Returns total size of S3 bucket
/api/file_index.json			→	Returns array of S3 bucket keys
/api/book_metadata.json			→	Returns all book metadata
/api/download_counts.json		→	Returns download counts by entry ID
/api/resolved_download_counts.json	→	Returns download counts with resolved metadata
/api/category_index.json		→	Returns list of all categories (used or not)
/api/category_frequencies.json		→	Returns frequency table of categories used
/api/author_index.json			→	Returns unique array of authors
/api/author_initials.json		→	Returns unique array of author initials
/api/authors_by_initial.json		→	Returns hash of authors grouped by initial
/api/ip_astronomy.json			→	Returns astronomy data by IP address
/api/thelemic_date.json			→	Returns the current Thelemic date
/api/thelemic_date.txt			→	Returns the formatted Thelemic date as text
/api/liber_resh.json			→	Returns the Liber Resh times by IP address