SI-5205 Finish applying octal deletion

The original PR was partially applied to markdown.

https://github.com/scala/scala-dist/pull/103
Merge pull request #4151 from som-snytt/issue/5205

SI-5205 Finish applying octal deletion
Added companion and package links explicitly to the scaladoc title bar to make them easier for newcomers to find.
Merge branch '2.11.x' into scaladoc