Changed package naming across all examples.

callback/src/main/java/com/iluwatar/callback/App.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.callback;
 
 /**
  * Callback pattern is more native for functional languages where function is treated as first-class citizen.

callback/src/main/java/com/iluwatar/callback/Callback.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.callback;
 
 /**
  * Callback interface

callback/src/main/java/com/iluwatar/callback/SimpleTask.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.callback;
 
 /**
  * Implementation of task that need to be executed

callback/src/main/java/com/iluwatar/callback/Task.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.callback;
 
 /**
  * Template-method class for callback hook execution