Add README [ci skip]

1 job for master in 2 minutes and 43 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Cml Run
failed cml #76827

00:02:43

 
Name Stage Failure
failed
cml Cml Run
$ cml-publish confusion_matrix.png --md --title 'confusion-matrix' >> report.md
$ cml-send-comment report.md
Error: token not found
at new Gitlab (/cml/src/drivers/gitlab.js:17:23)
at get_driver (/cml/src/cml.js:45:35)
at CML.comment_create (/cml/src/cml.js:88:18)
at async run (/cml/bin/cml-send-comment.js:20:3)
Cleaning up file based variables
ERROR: Job failed: exit code 1