Added Java and Maven prerequisites.

Author: jkorab

README.md

@@ -5,7 +5,13 @@ This project contains the sample code for the [_Apache Camel Developer's Cookboo
 by [Scott Cranton](https://github.com/scranton) and [Jakub Korab](https://github.com/jkorab). The latest version of this code is available on
 [GitHub](http://github.com/CamelCookbook/camel-cookbook-examples).
 
-The samples are all driven from unit tests, so in order to execute them all you need to do is run:
+All of the examples are driven through JUnit tests, and are collectively structured as a set
+of Apache Maven projects. To execute them, you will need a copy of the [Java 7 JDK]
+(http://www.oracle.com/technetwork/java/javase/downloads/index.html) (6 should be OK as well)
+and an [Apache Maven 3](http://maven.apache.org/) installation . Maven will download
+all of the appropriate project dependencies.
+
+In order to execute all the tests, all you need to do is run:
 
     $ mvn clean install