Move website documentation to its own page.
Write "making releases" documentation.
Remove `pre-release_checklist.md`.
Small fix in "making releases" documentation.
Fix build step in "making releases" doc.
Small fix in "making releases documentation".
Merge branch 'master' into doc_release
Fixes to section headings format in "making releases".
Typo.
Fixed sections headings format in website doc.
Merge branch 'master' into doc_release
Fix an error in making releases documentation.
Merge pull request #593 from wymeditor/doc_release

Improved "making releases" documentation.