Add report-card

Runs report-card in drone.
Sets two env vars, used to pip install report-card and update GH status.

Author: nathanleiby

.drone.yml

@@ -1,3 +1,6 @@
+env:
+- REPORT_CARD_GITHUB_STATUS_TOKEN=$$report_card_github_status_token
+- REPORT_CARD_GITHUB_REPO_TOKEN=$$report_card_github_repo_token
 image: python2.7
 notify:
   email:
@@ -9,5 +12,6 @@ notify:
     on_success: false
     webhook_url: $$slack_webhook
 script:
+- sudo pip install -q git+https://[email protected]/Clever/report-card.git; GITHUB_API_TOKEN=$REPORT_CARD_GITHUB_STATUS_TOKEN report-card --publish || true
 - pip install -r test/requirements.txt
 - python setup.py develop && python setup.py test