v0.1.5

Changelog

• 5881d09 Make a card's description readable, and only fetch it when asked

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Verify a download:

shasum -a 256 -c trello-cli_0.1.5_checksums.txt --ignore-missing

Run trello-cli contract for the envelope version and exit-code table this
build obeys, and trello-cli version for the build itself.