Update assembly plugin configuration for runnable examples jar.

Author: heuermh

Readme.txt

@@ -56,8 +56,6 @@ To build all the Piccolo2D modules
 
 $ mvn install
 
-To build and run the Piccolo2D examples runnable jar
+To run the Piccolo2D examples runnable jar
 
-$ cd examples
-$ mvn assembly:assembly
-$ java -jar target/piccolo2d-examples-3.0.1-jar-with-dependencies.jar
+$ java -jar examples/target/piccolo2d-examples-{version}-jar-with-dependencies.jar

examples/pom.xml

@@ -72,6 +72,15 @@
             <descriptorRef>jar-with-dependencies</descriptorRef>
           </descriptorRefs>
         </configuration>
+        <executions>
+          <execution>
+            <id>make-assembly</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+          </execution>
+        </executions>
       </plugin>
     </plugins>
   </build>