Now we're on GitLab 11.7, we can use include:template: to bring in the
default AutoDevOps template.

Add an initial implementation of the scheduler application. The initial
implementation contains:

* Documentation (README, an API reference and getting started guide)
* Test harness using tox
* docker-compose based development environment
* A Dockerfile
* An ingest loop for Google Sheets
* A stub implementation of the Opencast scheduler which prints what
  events should be scheduled.