fancynpcs, fancyholograms: Add isLoaded methods (#107)

plugins/fancynpcs/fn-api/src/main/java/de/oliver/fancynpcs/api/NpcManager.java

@@ -26,6 +26,8 @@ public interface NpcManager {
 
     void loadNpcs();
 
+    boolean isLoaded();
+
     void reloadNpcs();
 
 }

plugins/fancynpcs/src/main/java/de/oliver/fancynpcs/NpcManagerImpl.java

@@ -440,6 +440,11 @@ public class NpcManagerImpl implements NpcManager {
         this.setLoaded();
     }
 
+    @Override
+    public boolean isLoaded() {
+        return isLoaded;
+    }
+
     private void setLoaded() {
         isLoaded = true;
         new NpcsLoadedEvent().callEvent();