Add section header comments

Add compilation support

Remove full path from verbose output

Save result of uiop:argv0

Do not show script directory on usage line

Allow renaming start.lisp

Suppress *standard-output* spew during asdf loads

with-user-abort: Update submodule

README.md: Mention unix-opts

Update copyright years

Shorten some lines

Reorganize boilerplate

run-tests: Test remainder arguments

Mention ECL again

README.md: Update for unix-opts help output

Update timings

run-tests.lisp: Finish test runner

unix-opts: Point to fitzsim pending-prs branch

Remove CLON and dependencies

Remove CLON until https://github.com/didierverna/clon/issues/8 is fixed.
Remove CLON dependencies, named-readtables, trivial-features, babel,
alexandria, and cffi.

run-tests.lisp: Begin test runner