Add feature to do auto signup with external auth
This adds a feature flag: AUTH_USE_MIT_CERTIFICATES_IMMEDIATE_SIGNUP
that does an automatic signup of users if they are using external authentcation.
Fixed PEP8 and indentation issues
Added tests for signup skipping
Corrected CMS tests so that one is passing, added external_auth to cms apps
Several pylint fixes and bad super call
Removing external_auth addition to cms, and skipping test
Change video transcripts to use locators instead of locations.

Part of STUD-870
BLD-525: Fix Numerical input to support mathematical operations.
Update the XBlock version.
Add comment.
Fix LTI max_score method.
Add min value.
Merge pull request #1182 from carsongee/add_mitx_ssl_bypass_signup

Add feature to do auto signup with external auth
Merge pull request #1810 from edx/anton/fix-math-operations-in-numerical-input

Fix Numerical input to support mathematical operations.
BLD-542: Add display name.
Make has_score to be XField insted of decriptor property.
Fix LTI tests.
Merge pull request #1820 from edx/anton/fix-lti-display-name

LTI: Add display name.
Merge branch 'release'
Show full diffs in ResponseType tests.
Make runone work with more test output.