Add TahiEpub
Use TahiEpub::Reader insteas of EpubManager to extract
Use TahiEpub::Writer instead of EpubManager
Add TAHI_TOKEN
Update fog
Remove comments
Remove ImportController
Remove import get route
Use TahiEpub::Storage rather than manual uploads
Use TahiEpub to refactor ConversionWorker
Remove EpubManager
Make sure tahi_epub is from github
Rename method and use environment variable properly
Extract ENV vars