Merge apibutnotreally with the main packages

Do not consider anything outside of the true API safe to use. And even then,
I'm changing things. Just wait. Please I beg you.

src/main/java/WayofTime/bloodmagic/item/ItemSigil.java

@@ -0,0 +1,38 @@
+package WayofTime.bloodmagic.item;
+
+import WayofTime.bloodmagic.util.Constants;
+import WayofTime.bloodmagic.iface.IBindable;
+import WayofTime.bloodmagic.iface.ISigil;
+import WayofTime.bloodmagic.util.helper.NBTHelper;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+
+/**
+ * Base class for all (static) sigils.
+ */
+public class ItemSigil extends Item implements IBindable, ISigil {
+    private int lpUsed;
+
+    public ItemSigil(int lpUsed) {
+        super();
+
+        this.lpUsed = lpUsed;
+    }
+
+    public boolean isUnusable(ItemStack stack) {
+        NBTHelper.checkNBT(stack);
+
+        return stack.getTagCompound().getBoolean(Constants.NBT.UNUSABLE);
+    }
+
+    public ItemStack setUnusable(ItemStack stack, boolean unusable) {
+        NBTHelper.checkNBT(stack);
+
+        stack.getTagCompound().setBoolean(Constants.NBT.UNUSABLE, unusable);
+        return stack;
+    }
+
+    public int getLpUsed() {
+        return lpUsed;
+    }
+}