Merge pull request #39 from masben-mb/master

Fix - The karlsenminer still shows a Go trace #38

cmd/karlsenminer/config.go

@@ -83,7 +83,8 @@ func parseConfig() (*configFlags, error) {
 	}
 
 	if cfg.MiningAddr == "" {
-		return nil, errors.New("--miningaddr is required")
+		fmt.Fprintln(os.Stderr, errors.New("Error parsing command-line arguments: --miningaddr is required"))
+		os.Exit(1)
 	}
 
 	initLog(defaultLogFile, defaultErrLogFile)