Add a note in CONTIRBUTING.md that imperative mood is the preferred way to write commit messages. Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
We already had this on our website, but GitHub suggests to have this in the repo as well. Signed-off-by: Dirk Hohndel <dirk@hohndel.org>