1.13:
-----
 * Added legal property bag information for gdpr/dsgvo

1.12:
-----
 * Check openssl extension loaded
 * Raise PHP requirement

1.11:
-----
 * Change author list on author's request.

1.10:
-----
 * Add local documentation (German language only).

1.9:
----
 * Fix PHP warning for API declaration method should be
   compatible with serendipity_plugin core method.

1.8:
----
 * Use core language API, sets requirement to S9y 1.6+

1.7:
    * Add option for linking to buzer.de
    * Add option to exclude headings from linking.
    * Rephrase plugin configuration screen.
    * Normalize whitespace.
    * Add Changelog.

1.6:
    * Updated to v1.6 from upstream.
    * Improve connection code, switch to SSL and
      add an user agent.

1.5:
    * Updated to v1.5 from upstream.
    * Add uninstall function (dropping database) and
      option to clear the cache.

1.2:
    * Imported to git.