GitLab Next

The notation we use to represent a note is:

```
NOTE: **Note:**
This is a note
```

This is rendered by Nanoc and presented in an alert box in the docs
site. The second `**Note:**` can be redundant, so let's remove it.

The previous URL had two drawbacks:

1. It didn't match what the title was about (`Assignments to DevOps
   Stages and Groups`, and the anchor was `#designated-technical-writers`).
2. It didn't account for the other sections, like development and API
   guidelines.

These unowned docs need future tense scrubbed out of them too!

Add unassigned metadata to doc pages

Update unit tests for github import and sequential github import

Update GitHub import API documentation

A few new exceptions to add to the list of words we'll allow.

Adding integration tests for the new endpoint
Adding CHANGELOG
Creating new Bitbucket server service to handle endpoint logic

Also Standardize quote usage & replace look-alike PRIVATE-TOKENs

The code blocks for each API call on these pages did not specify a
code style. Most are HTTP requests for API calls.

Find and replace bash with shell

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.