Link referring to original algorithm/implementation is broken

[AlbertEmil]

The link provided in README.md referring to the original algorithm or implementation, respectively is broken. The mentioned Bitbucket repo seems to be not available anymore.

[philipp-baumann]

https://pypi.org/project/ono/ => would be good to link to this one. The latest release is May 11, 2018. There is an email on here and you also find a some hints here: http://gwyddion.net/contact.php