Add predefined creature types for all professions of villagers and zo…

…mbies

including baby variants of each.

src/io/github/totemo/doppelganger/IPredefinedCreature.java

@@ -0,0 +1,29 @@
+package io.github.totemo.doppelganger;
+
+import org.bukkit.Location;
+import org.bukkit.entity.LivingEntity;
+
+// ----------------------------------------------------------------------------
+/**
+ * The interface implemented by all {@link PredefinedCreature}s
+ */
+public interface IPredefinedCreature
+{
+  // --------------------------------------------------------------------------
+  /**
+   * Return true if the specified LivingEntity is of this type.
+   *
+   * @param living the creature to examine.
+   * @return true if it is this type of PredefinedCreature.
+   */
+  boolean isInstance(LivingEntity living);
+
+  // --------------------------------------------------------------------------
+  /**
+   * Spawn a creature of this type at the specified location.
+   *
+   * @param loc the Location.
+   * @return the LivingEntity.
+   */
+  LivingEntity spawn(Location loc);
+} // class IPredefinedCreature