• IMPORTANT: The maxminddb extension now obeys open_basedir. If
  open_basedir is set, you must store the database within the
  specified directory. Placing the file outside of this directory
  will result in an exception. Please test your integration before
  upgrading the extension. This does not affect the pure PHP
  implementation, which has always had this restriction. Reported
  by Benoît Burnichon. GitHub #61.
• A custom autoload.php file is provided for installations without
  Composer. GitHub #56.