Add CI

.gitlab-ci.yml

+image: docker.km3net.de/base/python:3
+
+stages:
+  - install
+  - test
+  - doc
+
+before_script:
+    - pip install cookiecutter
+    - cookiecutter --no-input .
+    - cd awesome
+
+install-py3.5:
+    image: docker.km3net.de/base/python:3.5
+    stage: install
+    script:
+        - make install
+
+install-py3.6:
+    image: docker.km3net.de/base/python:3.6
+    stage: install
+    script:
+        - make install
+
+install-py3.7:
+    image: docker.km3net.de/base/python:3.7
+    stage: install
+    script:
+        - make install