Add license information to source file, too

chronometrist-goal.el

@@ -10,6 +10,15 @@
 (require 'chronometrist-queries)
 (require 'alert)
 
+;; This is free and unencumbered software released into the public domain.
+;;
+;; Anyone is free to copy, modify, publish, use, compile, sell, or
+;; distribute this software, either in source code form or as a compiled
+;; binary, for any purpose, commercial or non-commercial, and by any
+;; means.
+;;
+;; For more information, please refer to <https://unlicense.org>
+
 ;;; Commentary:
 
 ;;; It is hoped that `chronometrist-goals-alert-functions' provides a good balance