[#161] Replaced 'glob()' with 'scandir()' in 'LayoutManager' so shipp…

…ed layouts resolve inside a PHAR. (#162)

Collapsed the four overview documentation pages into two. (#159)

[#84] Restructured the docs sidebar into always-visible sections. (#87)

Fixed documentation drift, aligned demo content and expanded the READ…

…ME quick start. (#81)