Added gradle build files (experimental)

docs/faq/build.gradle

@@ -0,0 +1,14 @@
+usePlugin('docbook')
+
+defaultTasks 'docbookHtmlSingle'
+
+docbookSrcFileName = 'faq.xml'
+docbookHtmlSingle.stylesheet = new File(projectDir, 'src/xsl/html-single-custom.xsl')
+
+docbookHtmlSingle.doLast {
+	resourcesDir = new File(projectDir, 'src/resources')
+	ant {
+		docsDir = new File(buildDir, 'docs')
+		copy(toDir: docsDir) {fileset(dir: resourcesDir)}
+	}
+}