Merge branch 'gha' of 'https://github.com/vchrombie/grimoirelab-bestiary'

[CI] Migrate from Travis CI to GitHub Actions

Merge branch 'support-35-36-travis' of 'https://github.com/valeriocos/grimoirelab-bestiary'

[bestiary] Fix flake8 errors

[travis] Support for python 3.5 and 3.6

Exclude 'unicorn' branch from Travis CI testing

Change position of ecosystem-related buttons

Add information messages to web UI related to important actions

Add new features: edit and remove ecosystems and projects

[docker] Use the new kibiter image which starts in a few seconds

[editor] Add feature: force add modals opening if there's no data

[editor] Disable certain forms when no data is selected

[settings] Allow host 172.17.0.1 to use bestiary running in host from containers

[projects] Remove old link to "/editor" and the urlpattern supporting it

[projects] Make all URLs relative in project app