debian/control: Bump standards-version to 3.9.5

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian/copyright: Add a pointer to the full text of the license

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian/changelog: Add 0.1.6.3-2 news items

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>