refactored pixelblock and fully utilizing taskchains

src/main/java/eu/mhsl/minecraft/pixelblocks/Main.java

@@ -56,7 +56,9 @@ public final class Main extends JavaPlugin {
     @Override
     public void onEnable() {
         Main.taskFactory = BukkitTaskChainFactory.create(this);
+        getLogger().info("Loading existing blocks from Database");
         database.loadPixelBlocks();
+        getLogger().info("Pixelblock loading done");
 
         Listener[] listeners = {
             new EnterPixelBlockListener(),