Please add cl-why

[jpcima]

Please add cl-why: (X)HTML generation macros, fork of CL-WHO
https://github.com/jpcima/cl-why

Tests pass in SBCL and ECL, and works in CLISP despite one minor failure.

(ql:quickload :cl-why)
(ql:quickload :cl-why-test)
(cl-why-test:run-all-tests)

[quicklisp]

Please ensure each system definition has a :description, :author, and :license.

[jpcima]

I have added the missing metadata in cl-why and cl-why-test.