Add a sample app with just beans that are Functions

Make it deployable via its maven coordinates in
spring-cloud-function-deployer (it is deployed by default on start
up right now, but that's just a demo)

spring-cloud-function-samples/spring-cloud-function-sample/src/main/java/com/example/SampleApplication.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2013-2016 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 com.example;
+
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+import reactor.core.publisher.Flux;
+
+@SpringBootApplication
+public class SampleApplication {
+
+	@Bean
+	public Function<Flux<String>, Flux<String>> uppercase() {
+		return flux -> flux.map(value -> value.toUpperCase());
+	}
+
+	@Bean
+	public Supplier<Flux<String>> words() {
+		return () -> Flux.fromArray(new String[] { "foo", "bar" });
+	}
+
+	@Bean
+	public Function<Flux<String>, Flux<String>> lowercase() {
+		return flux -> flux.map(value -> value.toLowerCase());
+	}
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleApplication.class, args);
+	}
+
+}