+ * When key to use not specified any other way, use the debian/changelog
+ trailer line. Closes:#793423.
+ * Honour --git= (mostly).
+ * Test suite: More automatic enumeration of tests.
+ * Rename `git-build' operation to `gbp-build' to make it clearer what
+ it's for. Keep the old name as an alias.
+ * Show `dgit sbuild' in usage message.
+ * When we are using dpkg-buildpackage to clean before using it to also
+ do the build, let it do its cleaning thing as part of its run, rather
+ than running it twice. When we are _not_ supposed to be using
+ dpkg-buildpackage to clean, but we are running it to do the build,
+ pass -nc.
+ * Also suppress spurious runs of the clean target when building using
+ git-buildpackage.
+ * Test suite: Provide tests which check that all our various build
+ operations run the right targets as expected (ie, that we are massaging
+ the arguments to dpkg-buildpackage, and suppressing our clean target,
+ etc., correctly).