Added full module example

examples/godot_examples/godot_resources/scripts/CustomModuleExampleScene.gd

@@ -0,0 +1,28 @@
+extends Node2D
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+    print("hello")
+
+    # Use existing node
+    print($CustomKomputeNode.get_total())
+
+    $CustomKomputeNode.add(10)
+    print($CustomKomputeNode.get_total())
+
+    $CustomKomputeNode.add(10)
+    print($CustomKomputeNode.get_total())
+
+    # Create new instance
+    var s = KomputeSummatorNode.new()
+
+    # This will print 0 as it's a new instance
+    print(s.get_total())
+
+    # Now we can again send further commands
+    s.add(10)
+    print(s.get_total())
+
+    s.add(10)
+    print(s.get_total())
+