Thanks to Thorsten Jolitz for contributing support for this new
language.
* Makefile (LISPF): Add ob-picolisp to the Makefile.
* contrib/babel/langs/ob-picolisp.el: Remove from contrib.
* lisp/ob-picolisp.el: Add to core lisp directory.
* lisp/org.el (org-babel-load-languages): Add Pico Lisp to the list of
supported code block languages.