Added samples for annotation processing article. (#705)

* Added annotation processing examples. Fixed core-java8 build on OS X

* Moved projects to separate submodule

annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.annotation;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class PersonBuilderTest {
+
+    @Test
+    public void whenBuildPersonWithBuilder_thenObjectHasPropertyValues() {
+
+        Person person = new PersonBuilder()
+                .setAge(25)
+                .setName("John")
+                .build();
+
+        assertEquals(25, person.getAge());
+        assertEquals("John", person.getName());
+
+    }
+
+}