INTSAMPLES-63 - Polish Tcp-Client-Server Sample

For reference see: https://jira.springsource.org/browse/INTSAMPLES-63

* Update README.md
* Code clean-up (E.g. convert spaces to tabs)
* Make sample executable via Maven

basic/tcp-client-server/pom.xml

@@ -16,6 +16,7 @@
 		<spring.integration.version>2.2.0.RELEASE</spring.integration.version>
 		<log4j.version>1.2.17</log4j.version>
 		<junit.version>4.10</junit.version>
+		<java.main.class>org.springframework.integration.samples.tcpclientserver.Main</java.main.class>
 	</properties>
 	<dependencies>
 		<dependency>
@@ -75,6 +76,14 @@
 					<showDeprecation>true</showDeprecation>
 				</configuration>
 			</plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>exec-maven-plugin</artifactId>
+				<version>1.2.1</version>
+				<configuration>
+					<mainClass>${java.main.class}</mainClass>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 	<repositories>