Helpers do not need to be Zoidberg methods. Standalone functions are better
Helpers are going to be needed in converter.py so they have to be importable -> move to helpers.py
PEP8
[UI] form now tkes the whole page width
change metadata storage, add json web interface and refactoring
add default value to exposed Zoidberg methods and use 301 for /add responses
return all metadata with /status