Remove dead code
Improve testing logging
Refactor - Improve and add test on setup loading + make variable local buffer
Refactor - call interactively the org-trello-mode in test context
Fix tests
Wrap variable in a local one
Fix trouble when opening buffer org-trello-buffer-tests.el somehow
linked to this code being ran
Refactor - Dedicate an apply-deferred computation execution function
Refactor - Add some logging at appropriate times