Conversion to Gradle

Typical Gradle setup for a Java web application which would offer the following benefits:

 * Maven style build lifecycle, which includes testing
 * Automatic WAR creation
 * Maven dependency management - 3rd party libraries are automatically downloaded
 * Invoked using 'Gradle Wrapper':
   * Shell & Batch script files for *nix & Windows users
   * A specified version of Gradle automatically downloaded and run
 * Application may be run using Jetty