This allows us to call random factoids.
E.g.:
factadd global fact1 is /say This is fact1.
factadd global fact2 is /say Fact2 is also a pretty neat fact.
factadd global fact3 is /say But don't forget about fact3!
factadd global facts is fact1 fact2 fact3
factadd global randomfact is /call $facts
Invoking the `randomfact` factoid will now randomy pick between
fact1, fact2 and fact3.
This was added to support the `randomkr` factoid.
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