Adjusted Biome Specific Drop Rates.

Added a new "Stone Form"

Lurkers will become Stone Lurkers if they're exposed to daylight.

A Stone Lurker can no longer clone itself, but will hit MUCH harder then a regular Lurker.

A Stone Lurker will NOT revert back to a regular lurker when it's no longer in daylight.

Made a slight change to the "Clone Ability"

Now, when a Lurker Clones itself, the new lurker will have the same amount of Health as the Lurker who summoned it.  This change not only makes sense, but will limit Lurker Farming.