DF Mod: Shell Lime

Shells are Calcium Carbonate and when ground up have very similar composition to ground limestone. Dwarves without flux stone should thus be able to use large amounts of ground-up shell as a partial replacement.

In Brief this mod:

•  Allow shells to be ground into shell-lime at a Millstone
•  Allow shells and shell-lime to be burned to produce quicklime (same as limestone)
•  Allow shell-lime and quicklime to be used as a flux material in pig-iron and steel making

Made for and tested on DF v50.07

A Note: shell-lime as a fertilizer was a consideration, but that is out of the scope of this mod. IRL lime is used as a soil conditioner; to change the acidity of soil, and supplement fertilizer. If a mod expands on the fertilizer system I would love to make sure that shell-lime is compatible with it.

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