To make README.md informative. (But not yet enough).
More better README.md
To fix YATT::Lite::Util::lookup_path. Related to subpath filename extension.

* In YATT::Lite::Util::lookup_path,
when subpath has file-extension,
the extension was dropped before url matching.

Ex. if subpath was originally "/README.md", ".md" was dropped.
To add more pods (in English).