Blood Splatter

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The Entity class will have a property bool entitled Splattered which is set true if blood has been splattered on that tile.

The Draw function of Map will draw an entity red if blood has been splattered.

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When plants update, also go through the overworld and clean up blood splatters based on a successful dice roll. Dungeons will stay bloodied, though :)

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Now that this has been implemented, I would like to implement it spreading as an animation