Update README to use macros

README.ftl.md

 
 Run your service with `java -jar` at the command line:
 
-    java -jar target/gs-rest-service-0.1.0.jar
+    java -jar target/${project_id}-0.1.0.jar
 
 Logging output is displayed. The service should be up and running within a few seconds.
 
 Congrats! You've just developed a RESTful web service with Spring. This of course is just the beginning, and there are many more features to explore and take advantage of. Be sure to check out Spring's support for [securing](TODO), [describing](TODO) [managing](TODO), [testing](TODO) and [consuming](/gs-consuming-rest) RESTful web services.
 
 
-[zip]: https://github.com/springframework-meta/gs-rest-service/archive/master.zip
 [u-rest]: /understanding/rest
 [u-json]: /understanding/json
 [u-jsp]: /understanding/jsp

README.md

  - Jump ahead to [Create a resource representation class](#initial).
 
 **When you're finished**, you can check your results against the code in `gs-rest-service/complete`.
+[zip]: https://github.com/springframework-meta/gs-rest-service/archive/master.zip
 
 
 <a name="scratch"></a>
 Congrats! You've just developed a RESTful web service with Spring. This of course is just the beginning, and there are many more features to explore and take advantage of. Be sure to check out Spring's support for [securing](TODO), [describing](TODO) [managing](TODO), [testing](TODO) and [consuming](/gs-consuming-rest) RESTful web services.
 
 
-[zip]: https://github.com/springframework-meta/gs-rest-service/archive/master.zip
 [u-rest]: /understanding/rest
 [u-json]: /understanding/json
 [u-jsp]: /understanding/jsp