Quilt

• deb3(1) convert debian source package to new 3.0 (quilt) format
• dh_quilt_patch(1) apply patches listed in debian/patches/series
• dh_quilt_unpatch(1) unapply patches listed in debian/patches/series
• guards(1) select from a list of files guarded by conditions
• quilt(1) tool to manage series of patches