AppCLI changes. Moving onto looking into threading the search and processing

src/main/java/com/sothr/imagetools/AppCLI.java

@@ -26,6 +26,7 @@ class AppCLI {
       CommandLineParser parser = new BasicParser();
       CommandLine cmd = parser.parse(options, args);
       process(cmd);
+      System.exit(0);
     }  catch (Exception ex) {
       logger.error("Unhandled exception in AppCLI",ex);
     }