Changed package naming across all examples.

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

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 import java.util.Stack;
 

interpreter/src/main/java/com/iluwatar/interpreter/Expression.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 public abstract class Expression {
 

interpreter/src/main/java/com/iluwatar/interpreter/MinusExpression.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 public class MinusExpression extends Expression {
 

interpreter/src/main/java/com/iluwatar/interpreter/MultiplyExpression.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 public class MultiplyExpression extends Expression {
 

interpreter/src/main/java/com/iluwatar/interpreter/NumberExpression.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 public class NumberExpression extends Expression {
 

interpreter/src/main/java/com/iluwatar/interpreter/PlusExpression.java

@@ -1,4 +1,4 @@
-package com.iluwatar;
+package com.iluwatar.interpreter;
 
 public class PlusExpression extends Expression {