- [X] Use `defconst` keyword instead of defvar
Fix desc
  - [X] Open information 'labelNames' in get-board API call
  - [X] Ensure the information is retrieved when parsing http response for querying board information
Refacto - Use more conventional emacs-lisp for the connect to board command
Refacto - simplify form names
Remove file for the moment, will be generated again at the end of dev
If only one choice then `when`
Simplify call to its essence
Extract common behavior and add missing property to remove
Refacto - Improve the routine to install/connect to a board and add some
more test.
Fix missed renamed function
- [X] Refactor + Fix create / connect to board
- [X] Update metadata command about the board currently connected (sometimes, new information arise)
Extract helper function to load information in the buffer namespace
Use standard params
  - [X] Retrieve labels from the board
  - [X] Install labels/tags information in global org-trello metadata
  - [X] Show current labels
Remove duplicated function