trivial-system-loader provides a portable system downloader/loader
abstraction for Common Lisp. Instead of hard-coding (ql:quickload :mysystem), use (tsl:load-system :mysystem). tsl:load-system will
first try to use ocicl if available,
then quicklisp, then plain
asdf:load-system.
trivial-system-loader was written by Anthony Green and Michał "phoe"
Herda, and is distributed under the terms of the MIT license. See the
trivial-system-loader source files for details.