Add a simplistic spec for the trello class
Pass a hash instead of settings object to Trello

And set the attribute values during the construciton of the object.

Update the trello test to pass.
Update burndown data to reflect trello class constructor change
The methods for fetching resources are private
Add tests covering Trello Api failures
Add a fixme for handling timeouts
Remove duplication in constructing trello client
Fix trello object construction in cli
Merge pull request #3 from bkutil/refactor_trello

Refactor trello