Fix formatting problem in Working with Video Components

Update Text Input problem type: Multiple correct responses are now
possible

Updated Jenkins scripts

Stub Server Port Conflicts and Refactor

Refactored stub services for style and DRY

Added unit tests for stub implementations

Updated acceptance tests that depend on stubs.

Updated Studio acceptance tests to use YouTube stub server; fixed failing tests in devstack.

Fix typos in Announcement template.

Reformat xml_importer.py to be more readable

Jarv/readme installation

Markhoeber/documentation/analytics sprint 12

wiki and user_id_map tables finalized

Updates to video documentation

Updates to reflect new video component UI and uploading processes

Move default DOC_STORE_CONFIG to common

Video: Update behavior of start/end time fields.

Stop forcing video player’s speeds widget width

Workaround for "xhr.restore" failures.

Goncha/sass cache #os

Make LTI module not send grade_back_url if has_score=False

Corrects a bug experienced with external auth enabled

FED Cleanup of Studio Outline page

To prevent Errno::ETXTBSY when executing sass command.

Show answer for imageresponse

set default value for empty integer and float fields

Remove dot from a scenario name so the results roll up in Jenkins

Valera/lti graded additional tests 2

BLD-564.