Add @SpringBootApplication annotation

Add a new @SpringBootApplication which is equivalent to @Configuration,
@EnableAutoConfiguration and @ComponentScan.

See gh-1842

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/SpringBootApplication.java

+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Indicates a {@link Configuration configuration} class that declares one or more
+ * {@link Bean @Bean} methods and also triggers {@link EnableAutoConfiguration
+ * auto-configuration} and {@link ComponentScan component scanning}. This is a convenience
+ * annotation that is equivalent to declaring {@code @Configuration},
+ * {@code @EnableAutoConfiguration} and {@code @ComponentScan}.
+ *
+ * @author Phillip Webb
+ * @since 1.2.0
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@Configuration
+@EnableAutoConfiguration
+@ComponentScan
+public @interface SpringBootApplication {
+
+}

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/autoconfigure/SpringBootCompilerAutoConfiguration.java

@@ -94,8 +94,9 @@ public class SpringBootCompilerAutoConfiguration extends CompilerAutoConfigurati
 
 	private boolean hasEnableAutoConfigureAnnotation(ClassNode classNode) {
 		for (AnnotationNode node : classNode.getAnnotations()) {
-			if ("EnableAutoConfiguration".equals(node.getClassNode()
-					.getNameWithoutPackage())) {
+			String name = node.getClassNode().getNameWithoutPackage();
+			if ("EnableAutoConfiguration".equals(name)
+					|| "SpringBootApplication".equals(name)) {
 				return true;
 			}
 		}