Documentation: create_sinon.js - update referenced JIRA issue.
Annotation Tools: Adding Annotator to CMS
Annotation Tools: Adding comments and adding CSS groups
Annotation Tools: Adding try-catch in case Annotator is missing from LMS
Support ipv6 in geoinfo and Embargo
Merge pull request #4808 from edx/tim/open-STUD-1264

Documentation: create_sinon.js - update referenced JIRA issue.
Merge pull request #4823 from lduarte1991/lduarte-harvardx-pr19

Annotation Tools: Adding Annotator to CMS
Merge pull request #4625 from fmyzjs/ipv6

Support ipv6 in geoinfo and Embargo
BLD-1125: Validation of content experiments after managing a group.
Fixed icon alignment problem.