Merge branch 'unpythonize' into 'master'

Translate Python-based tests to C

See merge request dbus/dbus!37

Reviewed-by: pwithnall

diff --cc .travis.yml
Simple merge

diff --cc configure.ac
Simple merge

diff --cc tools/ci-install.sh
index 89fb4361723e23ebe4cfde96d9fe4dd17ef9ebf8,438568f61c6421f72455dcd4f65b5b34fe6e8131..e83285e8a7d855611937490b2b91396a73e85a12
--- 1/tools/ci-install.sh
--- 2/tools/ci-install.sh
+++ b/tools/ci-install.sh
@@@ -139,11 -142,7 +139,8 @@@ case "$ci_distro" i
              libexpat-dev \
              libglib2.0-dev \
              libselinux1-dev \
 +            libsystemd-dev \
              libx11-dev \
-             python \
-             python-dbus \
-             python-gi \
              valgrind \
              wget \
              xauth \