standardize directives

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/TestDirective.kt

@@ -9,16 +9,20 @@ class TestConfig(val project: Project, val isDefault : Boolean = false) {
     val testIncludes = arrayListOf("**/*Test.class")
     val testExcludes = arrayListOf<String>()
 
+    @Directive
     var name: String = ""
 
+    @Directive
     fun args(vararg arg: String) {
         testArgs.addAll(arg)
     }
 
+    @Directive
     fun jvmArgs(vararg arg: String) {
         jvmArgs.addAll(arg)
     }
 
+    @Directive
     fun include(vararg arg: String) {
         testIncludes.apply {
             clear()
@@ -26,6 +30,7 @@ class TestConfig(val project: Project, val isDefault : Boolean = false) {
         }
     }
 
+    @Directive
     fun exclude(vararg arg: String) {
         testExcludes.apply {
             clear()
@@ -35,11 +40,12 @@ class TestConfig(val project: Project, val isDefault : Boolean = false) {
 }
 
 @Directive
-fun Project.test(init: TestConfig.() -> Unit) = let { project ->
+fun Project.test(init: TestConfig.() -> Unit): TestConfig = let { project ->
     with(testConfigs) {
         val tf = TestConfig(project).apply { init() }
         if (! map { it.name }.contains(tf.name)) {
             add(tf)
+            tf
         } else {
             throw KobaltException("Test configuration \"${tf.name}\" already exists, give it a different "
                     + "name with test { name = ... }")