Add formulae to allow for lead pile and lead bar conversions.

formulae

@@ -327,13 +327,23 @@ ingred 5 iron ore
 # lead bar
 Object NONE
 arch leadbar
-chance 8
+chance 4
 diff 3
 exp 500
 skill smithery
 cauldron forge
 ingred 5 lead ore
 #
+# lead bar (from alchemical lead)
+# Not quite weight-constant to avoid exp loops with the file
+Object NONE
+chance 4
+diff 2
+exp 250
+skill smithery
+cauldron forge
+ingred 3 lead
+#
 # platinum bar
 Object NONE
 arch platbar
@@ -4605,6 +4615,14 @@ chance 0
 combination 1
 tool file
 #
+Object NONE
+arch lead
+yield 2
+ingred lead bar
+chance 0
+combination 1
+tool file
+#
 # gem combos
 Object NONE
 arch raw_diamond_great_value