Improve handling of borky events

[johndrinkwater]

It appears a cast event was created as a livestream, and then updated yet this is not reflected on the site - even with a forced event update.
The server pulls down XML pages, and we parse them as needed.

Look through the reason why the countdown is not shown on the /cast/ page.
(I assume in a few hours it may be ok though)

[beansmyname]

Changing the stream title from:
SteamLUG Cast Season 4 Episode 5 Recording
to:
SteamLUG Cast S04E05 Recording
and updating events brought the countdown back.

https://github.com/SteamLUG/steamlug.org/blob/master/includes/functions_events.php#L32 appears to look for Cast in the title but that wasn't sufficient to trigger the countdown.