Latest gradle syntax updates.

buildSrc/build.gradle

@@ -1,4 +1,4 @@
-apply id: 'groovy'
+apply plugin: 'groovy'
 
 repositories {
     mavenRepo name:'localRepo', urls: "file://" + System.properties['user.home'] + "/.m2/repository"

buildSrc/src/main/groovy/docbook/DocbookPlugin.groovy

@@ -36,7 +36,7 @@ import com.icl.saxon.TransformerFactoryImpl;
  * which it operates.
  */
 class DocbookPlugin implements Plugin<Project> {
-    public void use(Project project) {
+    public void apply(Project project) {
         // Add the plugin tasks to the project
         Task docbookHtml = project.tasks.add('docbookHtml', DocbookHtml.class);
         docbookHtml.setDescription('Generates chunked docbook html output');