Religious events fix
Couple of vanilla SoA religious event fixes
Assets Introduction cleanup

These no longer get fired, but I cleaned up the modifiers anyway!
Some VIET Celtic event fixes

Seems like there are a lot of missing tooltips and other localizations.
It also references an event, VIETceltic.32, which doesn't seem to exist
anywhere.
VIET Chinese flavor fixes
VIET Finnish Pagan event fixes
VIET Immersion misc event fixes