add a release guide

Even though there are very few steps involved, it is good to have it documented.

.gitlab-ci.yml

 image: quantumtinkerer/research
+
 test:
   script:
     - pip install -r test-requirements.txt
@@ -7,3 +8,11 @@ test:
   artifacts:
     paths:
       - htmlcov
+
+authors check:
+  script:
+    - AUTHORS=`bash -c "echo $(git shortlog -s) | sed -e 's/^[0-9\t ]*//'| xargs -i sh -c 'grep -q \"{}\" AUTHORS.md || echo \"{} missing from authors\"'"`
+    - echo $AUTHORS
+    # - sleep 10000
+    # - if [ ! -z $AUTHORS ]; then { echo $AUTHORS; exit 1; }; fi
+  allow_failure: true