Merge pull request #21 from edx/add-openedx-yaml

Add an OEP-2 compliant openedx.yaml file

openedx.yaml

+# This file describes this Open edX repo, as described in OEP-2:
+# http://open-edx-proposals.readthedocs.io/en/latest/oeps/oep-0002.html#specification
+
+nick: lti
+oeps: {}
+owner: edx/teaching-and-learning
+track-pulls: true