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-core/pom.xml

@@ -18,6 +18,10 @@
 	</properties>
 
 	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-function-compiler</artifactId>
@@ -46,6 +50,13 @@
 				<configuration>
 					<classifier>registrar</classifier>
 				</configuration>
+				<dependencies>
+					<dependency>
+						<groupId>org.springframework.boot.experimental</groupId>
+						<artifactId>spring-boot-thin-launcher</artifactId>
+						<version>${wrapper.version}</version>
+					</dependency>
+				</dependencies>
 			</plugin>
 		</plugins>
 	</build>