Daniel Stone authored Apr 11, 2017 and Adam Jackson committed Apr 11, 2017

The Contributor Covenant applies to all fd.o-hosted resources, including
lists and Bugzilla. Add a note to the README, reminding people to act
like human beings.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>