Status Updates part 6: Add resource for status updates.

Review Request #8407 — Created Sept. 18, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
2d8b8cc...

Reviewers

This change adds an API endpoint for creating and manipulating status updates.
This is intended to be used by consumers who want to create status updates from
a purely third-party source without writing an extension.

Ran unit tests.