Added gradle build files (experimental)

docs/manual/build.gradle

@@ -0,0 +1,19 @@
+usePlugin 'docbook'
+
+defaultTasks 'docbookHtml'
+
+docbookSrcFileName = 'springsecurity.xml'
+docbookHtml.stylesheet = new File(projectDir, 'src/xsl/html-custom.xsl')
+docbookFoPdf.stylesheet = new File(projectDir, 'src/xsl/pdf-custom.xsl')
+
+docbookHtml.doLast {
+	resourcesDir = new File(projectDir, 'src/resources')
+	ant {
+		docsDir = new File(buildDir, 'docs')
+		copy(toDir: docsDir) {fileset(dir: resourcesDir)}
+		copy(toDir: new File(docsDir, 'images')) {fileset(dir: new File(projectDir, 'src/docbook/images'))}		
+	}
+}
+
+/*docbookSrc = new File(project.buildDir, 'docbook/src')
+docbookDir = new File(project.buildDir, 'docbook/stylesheets')*/