Fix #2: the script now ads the organization name to the filename for better sorting.

trello-org-[ORGNAME]-board-[BOARDNAME].json
Fix #3: if config is set to also save the closed boards, the script now prepends a 'CLOSED' tag to the filename.

trello-CLOSED-org-ORGNAME-board-BOARDNAME.json

'CLOSED-' is only prepended if the board is closed, otherwise it is just left out.
Re #2: this is much better in terms of performance. First fetch all organizations and make them accessible via OrganizationID.
Merge pull request #5 from cspiegl/master

Add Organization Name and CLOSED to filename