More appropriate name for compute the users assigned to a card.
formatting
Adding modifying loglevel comment as sample
Adding cask target to install it.
Update orgtrello-api to deal with members id
- Extract users-assigned data when parsing org entry
- creation/update call to trello api using those members assigned to card
  - [X] sync-to-trello also assign users
  - [X] sync-to-trello also unassign users
Adding default setup for the board to work with the new assignment/unassignment