Fixed build script if quick-docs build is made.
Fixed bad link in release notes.
Re-designed 2.6.0 release notes "New Features" section to improve readability.
Update the release version of authentication clients used, and cleaned up statements in build script.
Merge branch 'release/2.6.0' into feature/r2.6.0_release_notes_update
Merge pull request #831 from caskdata/feature/r2.6.0_release_notes_update

Release 2.6.0 release notes et al update