title: Why does Maven 3 give up supporting application $version declaration?
body: <p>As you see from the title, I want to ask that the case of in <a href="http://en.wikipedia.org/wiki/Apache_Maven" rel="noreferrer">Maven</a> 3 there is no support for $version in pom.xml anymore. Do we have to really write a constant every time in each project in every pom.xml and related configuration files again and again? How can we avoid doing this? How can we use a versioning method like $version?</p>