Actually handle all possible errors while attempting to read comicinfo.xml.

main.go

@@ -14,7 +14,7 @@ func main() {
 	app := cli.NewApp()
 	app.Name = "go-opds-pse"
 	app.Usage = "A lightweight OPDS server with PSE support."
-	app.Version = "1.0.0+dev"
+	app.Version = "1.0.1+dev"
 	app.Flags = []cli.Flag{
 		cmd.StringFlag("manga, m", "manga", "default manga folder"),
 	}