[ticket/12273] Add a basic set of tests for the exporter

PHPBB3-12273
[ticket/12273] Use the new class

PHPBB3-12273
[ticket/12273] Grab name of events with a function

PHPBB3-12273
[ticket/12273] Move grabbing the $vars array line to a method

PHPBB3-12273
[ticket/12273] Add more tests for the event exporter

PHPBB3-12273
[ticket/12273] Use class properties instead of parameters

PHPBB3-12273
[ticket/12273] Crawl the phpBB directory for events

PHPBB3-12273
[ticket/12273] Move event exporter to namespace

PHPBB3-12273
[ticket/12273] Rename exporter to php_exporter

PHPBB3-12273
[ticket/12273] Move MD Exporter to separate file

PHPBB3-12273
[ticket/12273] Fix export script

PHPBB3-12273
[ticket/12273] Fix invalid @event and @since tags

PHPBB3-12273
[ticket/12273] Fix missing $vars line

PHPBB3-12273
[ticket/12273] Fix Markdown layout

PHPBB3-12273