print info when sum up total file size of a directory

src/main/java/unimelb/mf/client/instrument/SourceContext.java

@@ -34,6 +34,7 @@ public class SourceContext {
         AtomicLong nbFiles = new AtomicLong(0);
         AtomicLong nbSymlinks = new AtomicLong(0);
         AtomicLong totalBytes = new AtomicLong(0);
+        System.out.println("summing up the total size of files in '" + dir + "' ...");
         try {
             Files.walkFileTree(dir,
                     followLinks ? EnumSet.of(FileVisitOption.FOLLOW_LINKS) : EnumSet.noneOf(FileVisitOption.class),

src/main/java/unimelb/mf/client/instrument/cli/InstrumentUploadList.java

@@ -130,6 +130,7 @@ public class InstrumentUploadList implements MFCommand {
                     upload.resolveSourceContext();
                 }
             }
+            System.out.println();
             UploadShareable.printUploads(uploads, System.out);
             
 

src/main/java/unimelb/mf/client/instrument/cli/InstrumentUploadMissingFind.java

@@ -141,6 +141,7 @@ public class InstrumentUploadMissingFind implements MFCommand {
 
     private static void printResult(Set<LocalDirectory> missingDirectories,
             Map<LocalDirectory, Upload> mismatchDirectories) {
+        System.out.println();
         if (!missingDirectories.isEmpty()) {
             long totalMissingFiles = 0;
             long totalMissingSize = 0;