Add method resolveAsFile to Maven shortcut API

final JavaArchive ejbJar = ShrinkWrap
        .createFromZipFile(JavaArchive.class, DependencyResolvers.use(MavenDependencyResolver.class)
                .loadMetadataFromPom("pom.xml").artifact("com.foo:bar")
                .resolveAsFiles(new StrictFilter())[0]);

final JavaArchive ejbJar = ShrinkWrap
        .createFromZipFile(JavaArchive.class, Maven.withPom("pom.xml").resolveAsFile("com.foo:bar"));