* Update suggestion command for building cornac from source

* Fix install command using escape dependency with specified version

Add Comparative Aspects and Opinions Ranking for Recommendation Explanations (Companion) model (#635)

* Add Companion model

* Add example

* Update docs

* Update Companion model with additional arguments, removing sentiment loss

* Add paper link

* refactor code

This reverts commit fcc97a55.

* Added validation for numpy import

* changed var due to deprecation notice

* Added required dependency checks

* update readme

* exit with install message

---------

Co-authored-by: tqtg <tuantq.vnu@gmail.com>

* add PyTorch backend for MF

* update example

---------

Co-authored-by: tqtg <tuantq.vnu@gmail.com>

Add Learn to Rank user Preferences based on Phrase-level sentiment analysis across Multiple categories (LRPPM) model (#527)

* Debug import numpy

* No pip upgrade

* Use ubuntu-latest image

* Use ubuntu-20.04 image

* Remove pip upgrade