Add deinitialize method to Mediator

Author: pcastornii

mvvm4fx-core/src/main/java/com/techsenger/mvvm4fx/core/AbstractComponent.java

@@ -108,6 +108,11 @@ public void setGroup(ComponentGroup value) {
         public ObjectProperty<ComponentGroup> groupProperty() {
             return group;
         }
+
+        @Override
+        public void deinitialize() {
+            AbstractComponent.this.deinitialize();
+        }
     }
 
     private final T view;

mvvm4fx-core/src/main/java/com/techsenger/mvvm4fx/core/AbstractComponentView.java

@@ -46,7 +46,7 @@ public AbstractComponent<?> getComponent() {
     }
 
     /**
-     * Performs initialization.
+     * Initializes view.
      */
     protected void initialize() {
         build();
@@ -56,7 +56,7 @@ protected void initialize() {
     }
 
     /**
-     * Performs deinitialization.
+     * Deinitializes view.
      */
     protected void deinitialize() {
         removeHandlers();

mvvm4fx-core/src/main/java/com/techsenger/mvvm4fx/core/ComponentMediator.java

@@ -22,4 +22,5 @@
  */
 public interface ComponentMediator extends ComponentDescriptor {
 
+    void deinitialize();
 }