added parameter selection with cross-validation
added parameter selection with cross-validation

quantitative-hadoopSVR/bootstrapped-hadoop-svr,quantitative-hadoopSVR/bootstrapped-hadoop-svr,quantitative-hadoopSVR/bootstrapped-hadoop-svr,quantitative-hadoopSVR/bootstrapped-hadoop-svr,quantitative-hadoopSVR/bootstrapped-hadoop-svr,quantitative-hadoopSVR/bootstrapped-hadoop-svr