[ticket/12015] Add more parameters to core.viewtopic_get_post_data

PHPBB3-12015
[ticket/12015] Add attachments to core.viewtopic_modify_post_row

PHPBB3-12015
[ticket/12015] Add an event after the post has been assigned to the template

PHPBB3-12015
[ticket/12015] Add post counting information to event

PHPBB3-12015
[ticket/12015] Add @change to events that got changed

PHPBB3-12015
[ticket/12015] Add some parameters to viewonline events

PHPBB3-12015
[ticket/12015] Fix english grammar

PHPBB3-12015
Merge pull request #1870 from nickvergessen/ticket/12015

Ticket/12015 Enhance events in viewtopic to increase their usability