Fix some meta
Fix typos in Element
add util.spawn_entity[].at[]
Make context work less-disruptively

They should be their entirely own system, really... but this'll do for
now.
Reunbreak context and determine

The previous commit broke - DETERMINE for I don't know why. This
unbreaks it.
Prevent NPEs in bad util.spawn_entity args
Add location.direction.vector
Fixed on entity killed event
Merge remote-tracking branch 'upstream/master'