Issue #254 Separate BASIS installation instructions from general installation how-to guide.
Issue #254 Rename overview section in side bar.
Issue #254 Change structure of full contents TOC.
Issue #254 Use subsections "First Steps" and "Advanced Tutorials" under Quick Start page.
Issue #254 Rearrange sections of PDF manual.
Issue #254 Remove title directive from overview page and mark it as :orphan:.