Renamed nomenclature to Demonic Will instead of souls - still missing a few spots

src/main/java/WayofTime/bloodmagic/api/soul/IDemonWill.java

@@ -0,0 +1,30 @@
+package WayofTime.bloodmagic.api.soul;
+
+import net.minecraft.item.ItemStack;
+
+public interface IDemonWill
+{
+    public double getWill(ItemStack soulStack);
+
+    public void setWill(ItemStack willStack, double will);
+
+    /**
+     * Drains the demonic will from the willStack. If all of the will is
+     * drained, the willStack will be removed.
+     * 
+     * @param willStack
+     * @param drainAmount
+     * @return The amount of will drained.
+     */
+    public double drainWill(ItemStack willStack, double drainAmount);
+
+    /**
+     * Creates a new ItemStack with the specified number of will. Implementation
+     * should respect the number requested.
+     * 
+     * @param meta
+     * @param number
+     * @return
+     */
+    public ItemStack createWill(int meta, double number);
+}