[ticket/11924] Bring layout of events.md to one style

PHPBB3-11924
[ticket/11924] Add script to export events.md with wiki markup

PHPBB3-11924
[ticket/11924] Add version info of template events to events.md

PHPBB3-11924
[ticket/11924] Reduce unneccessary load

PHPBB3-11924
[ticket/11924] Add option to export php event list

PHPBB3-11924
[ticket/11924] Fix some minor issues with the php event docs

PHPBB3-11924
[ticket/11924] Remove duplicated code

PHPBB3-11924
[ticket/11924] Do not use globals :(

PHPBB3-11924
[ticket/11924] Verify that the script is only run from command line

PHPBB3-11924
[ticket/11982] Fix z-index for AJAX popup background

PHPBB3-11982
Merge pull request #1832 from cyberalien/ticket/11982

Fix z-index for AJAX popup background
Merge pull request #1784 from nickvergessen/ticket/11924

[Ticket/11924] Add a script to export the events in wiki format