This fleshes out the "Automated Code Reviews" page further, providing

the page with the following sections:


Choosing Your Tools: A section on the available tools we provide

   (Review Bot, Jenkins, CircleCI, Travis CI)


Configuring Automated Reviews: General information on configuration

   and links to relevant documentation.


Performing Automated Reviews: Talks about how automated reviews are

   typically ran automatically, but that they can be configured with a

   Run button.


Automated Review Status and Results: Where status for automated

   reviews appear, how they update, and what to expect for failing

   reviews. This is a rewrite of the original primary section for the

   docs.


Developing Automated Review Tools: Some basic information on how to

   write custom tooling for automatic reviews.


There's also a glossary item added for "status update" and "status

updates", which we can refer to in public or codebase documentation.

Built the docs and read through them. Checked for spelling errors,

bad links, and build errors.