This project rocks and uses MIT-LICENSE.
Create a new file Gemfile.ekyviti
in the root directory and add these lines:
gem 'ekylibre_ekyviti', path: '../ekylibre_ekyviti'
gem 'cartography', git: 'https://gitlab.com/ekylibre/cartography.git', branch: 'ekyviti'
Execute:
$ bundle install
And then:
$ rails g ekylibre_ekyviti:install