Added more logging to multisample pipelines

public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/MultiSampleQScript.scala

@@ -202,8 +202,16 @@ trait MultiSampleQScript extends SummaryQScript { qscript: QScript =>
 
   /** Runs addAndTrackJobs method for each sample */
   final def addSamplesJobs() {
+    logger.info(s"Starting script for ${samples.size} samples")
+    var count = 0
     if (onlySamples.isEmpty || samples.forall(x => onlySamples.contains(x._1))) {
-      samples.foreach { case (sampleId, sample) => sample.addAndTrackJobs() }
+      samples.foreach { case (sampleId, sample) =>
+        logger.info(s"Starting script sample '$sampleId'")
+        sample.addAndTrackJobs()
+        count += 1
+        logger.info(s"Finish script for '$sampleId', samples done: $count / ${samples.size}")
+      }
+      logger.info("Starting script for multisample jobs")
       addMultiSampleJobs()
     } else onlySamples.foreach(sampleId => samples.get(sampleId) match {
       case Some(sample) => sample.addAndTrackJobs()