Enable stats reporting to datadog.

.travis.yml

@@ -2,9 +2,10 @@ language: python
 python: "2.7"
 install:
     - "pip install coveralls"
-script: 
+script:
     - make validate
     - git fetch origin master:refs/remotes/origin/master # https://github.com/edx/diff-cover#troubleshooting
     - make diff.report
 after_success:
     - coveralls
+    - bash ./scripts/build-stats-to-datadog.sh