Improve computation of the buffer's org data content.
- [X] Sprint backlog
- [X] Some refactoring + tests coverage
- [X] Merge org card's users assigned list and the trello one - reference github issue
  - [X] Compute the entities without sync'ed properties
Dump them on the file after the merge and writing of the trello and org data.
Referencing github issues on todo
Simplify computing entities without prior sync' activity
fix typo
Fix error
extract a function dedicated to compute the merge of the trello
users-assigned properties with the one from org
Adding itest regarding the merge-card scenario
format
fix computing the list of org data
- [X] Upgrade version
- [X] Upgrade version
No longer exists
after rebase - comment breaking test for the moment - do not remember