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Changes between Version 1 and Version 2 of Ticket #14

v1	v2
1	1	* Remove the "decay animation". Instead, the last frame of the death animation is sustained while the corpse is lying about and while it is decaying.
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2	3	* If an entity leaves a corpse, it should still decay (ie be removed from the map with a bit of eye candy) at some point to remove the entity for performance reasons (whether after a timer has elapsed, or based on some signal from the graphics engine).
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3	5	* Decay: If an entity doesn't leave a corpse (eg buildings decay immediately after being destroyed) or after its corpse state has elapsed, the default will be for it to sink vertically into the terrain, ideally with also a simple fade effect, until out of sight (basically the reverse of construction). Then it'll be removed from the game.
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