Merge pull request #294 from openedx/ashultz0/config_from_launch

CHANGELOG.rst

lti_consumer/__init__.py

lti_consumer/api.py

lti_consumer/lti_xblock.py

lti_consumer/models.py

lti_consumer/plugin/compat.py

lti_consumer/signals.py

lti_consumer/templatetags/get_dl_lti_launch_url.py

lti_consumer/tests/unit/plugin/test_views.py

lti_consumer/tests/unit/plugin/test_views_lti_ags.py

...consumer/tests/unit/plugin/test_views_lti_deep_linking.py

lti_consumer/tests/unit/test_api.py

lti_consumer/tests/unit/test_lti_xblock.py

lti_consumer/tests/unit/test_models.py