Merge branch 'ci/fsl-ci-rules' into 'master'

CI: Integrate common FSL CI rules for automatically building conda packages

See merge request fsl/fsl_mrs!13

.gitlab-ci.yml

+include:
+ - project: fsl/fsl-ci-rules
+   file:    .gitlab-ci.yml
+
 stages:
   - Static Analysis
   - Test
   - doc
+  - fsl-ci-pre
+  - fsl-ci-build
+  - fsl-ci-deploy
 
 flake8:
   image: python:3.7-slim-buster