From: gabriel pettier <dev@tangibledisplay.com>
Date: Sun, 9 Aug 2015 00:58:31 +0000 (+0200)
Subject: make backends.TaskWarrior inherit from Backend
X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/commitdiff_plain/751f8d376a042c6148e8c161f813ebd967c24e52?hp=751f8d376a042c6148e8c161f813ebd967c24e52

make backends.TaskWarrior inherit from Backend

fix missing `copy` import for Backend (fix test)
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