Add zombie apocalypse spell

src/main/java/electroblob/wizardry/registry/Spells.java

@@ -242,6 +242,8 @@ public final class Spells {
 
 	public static final Spell stormcloud = placeholder();
 
+	public static final Spell zombie_apocalypse = placeholder();
+
 	@SubscribeEvent
 	public static void register(RegistryEvent.Register<Spell> event){
 
@@ -445,6 +447,8 @@ public final class Spells {
 
 		registry.register(new Stormcloud());
 
+		registry.register(new ZombieApocalypse());
+
 	}
 
 }

src/main/java/electroblob/wizardry/registry/WizardryEntities.java

@@ -146,6 +146,7 @@ public class WizardryEntities {
 		registry.register(createEntry(EntityFireRing.class, 		"ring_of_fire", 		TrackingType.CONSTRUCT).build());
 		registry.register(createEntry(EntityHealAura.class, 		"healing_aura", 		TrackingType.CONSTRUCT).build());
 		registry.register(createEntry(EntityDecay.class, 			"decay", 				TrackingType.CONSTRUCT).build());
+		registry.register(createEntry(EntityZombieSpawner.class, 	"zombie_spawner", 	TrackingType.CONSTRUCT).build());
 
 		// These ones don't render, currently that makes no difference here but we might as well separate them
 		registry.register(createEntry(EntityArrowRain.class, 		"arrow_rain", 		TrackingType.CONSTRUCT).build());