Merge branch 'ci_skip_master' into 'master'

Ci skip master

See merge request !66

.gitlab-ci.yml

 image: "ubuntu:18.04"
 
+
+workflow:
+  rules:
+    - if: $CI_COMMIT_BRANCH == 'master'
+      when: never # we can't push directly to master so skip CI...
+    - when: always # ...but default to running CI otherwise
+
 before_script:
   - apt-get update && apt-get install -y python3-nose python3-lxml python3-yaml