add awk script to create json file with csv format
add logo
Refactor(menu): fixed-to-top + dropdown menu
Refactor(authors, books, tags, series): replace ol by ul
Refactor(main scss): enlarge padding-top
feat(npm): add dependency to 'csvtojson'

https://github.com/Keyang/node-csvtojson
feat(mk): add 'extract-books-authors' task

query sqlite db, export as CSV, and convert to JSON