code: public static String findMavenUrlForRoboconf( String artifactId, String version )
  	throws IOException {
  		return findMavenUrl( "net.roboconf", artifactId, version, "jar" );
  	}
docs: Finds the URL of a Roboconf (JAR) Maven artifact.
  @param artifactId an artifact ID (not null)
  @param version a version (not null)
  @return an URL if the resolution worked, null if it was not found
  @throws IOException