This also restores preAction and preReceiveAction effects, which were
previouosly ignored. To support this, findResult and mapUntil were
added to the prototype for arrays. These allow for functions with
side effects to be searched or mapped over.

This includes a new postEnter hook for status effects, so that
they can distinguish between consumption and transfer

Everything is now a Container; Containers have a set
of capabilities that describes what they can do

Also avoid absorbing non-victims, if only certain creatures are being digested.

Also makes it possible to selectively digest prey

The perks aren't visible yet. There's only one perk: Ravenous,
which makes the dire wolf even better at eating you.

The test can compare one or more of the user's stats against
one or more of the target's stats. This is explained by the test.

Also fixes a dumb bug where humans could make OTHER units surrender