Render typos
Merge pull request #3636 from bradleypriest/render

Render docs typos
Changelog renamed to .md, initial changes
Changed all releases to headings
[DOC] Add defeatureify to instructions.

[ci skip]
Removed duplicate entry
Merge pull request #3642 from knownasilya/changelog-md

CHANGELOG converted to Markdown
Merge pull request #3641 from rjackson/update_build_instructions

[DOC] Add defeatureify to instructions.