Merge branch 'ci/pages' into 'master'

CI: make sure funpack is on pypath

See merge request !73

.ci/gen_pages.sh

 #!/usr/bin/env bash
 
+set -e
+
 pip install -r requirements.txt
 pip install -r requirements-demo.txt
 pip install -r requirements-test.txt
 
+export PYTHONPATH=$(pwd)
+
 python .ci/generate_notebooks.py html
 
 mkdir public