added lecture 13 hardmode exercise

Author: joshHug

lec13/exercises/hardMode/Dog.java

@@ -0,0 +1,19 @@
+/** 
+ *  @author Josh Hug
+ */
+
+public class Dog {
+    private String name;
+    private String breed;
+    private double size;
+
+    public Dog(String n, String b, double s) {
+        name = n;
+        breed = b;
+        size = s;
+    }
+
+    public String toString() {
+        return name + " is a " + breed + " weighing " + size + " lbs.";
+    }
+} 

lec13/exercises/hardMode/DogLauncher.java

@@ -0,0 +1,10 @@
+/** 
+ *  @author Josh Hug
+ */
+
+public class DogLauncher {
+    public static void main(String[] args) {
+        Dog d = new Dog("frankie", "barnacle dog", 22);
+        System.out.println(d.toString());
+    }
+} 

lec13/exercises/hardMode/readme.md

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+Task 1: Convert the Dog and DogLauncher classes so that they are part of the ug.joshh.animal package. Successfully compile and run DogLauncher.
+
+Task 2: Create an ExternalDogLauncher class that is NOT part of the package, but which is nonetheless capable of creating and printing out a Dog. Do not use import statements.
+
+Task 2b: Modify your answer from task 2 so that it uses import statements.