change default idle timeout (from 60 to 120 sec)

Author: dncohen

README.MD

@@ -105,7 +105,7 @@ go-hash -db /path/to/file
 
 If the file already exists, go-hash will try to load it as an existing database.
 
-`go-hash` will prompt for master password if idle for 60 seconds (default).  To change the timeout, use flag `-idle <number of seconds>`.  Use `0` for no timeout.
+`go-hash` will prompt for master password if idle for 120 seconds (default).  To change the timeout, use flag `-idle <number of seconds>`.  Use `0` for no timeout.
 
 ```
 go-hash -idle 0

main.go

@@ -249,7 +249,7 @@ func main() {
 	fmt.Printf("%s (db version: %s)\n\n", os.Args[0], gohash_db.DBVersion) // verbose
 
 	var dbFilePath string
-	flag.UintVar(&idleSec, "idle", 60, "password timeout, in seconds (use 0 for no timeout)")
+	flag.UintVar(&idleSec, "idle", 120, "password timeout, in seconds (use 0 for no timeout)")
 	flag.StringVar(&dbFilePath, "db", getGoHashFilePath(), "file where password data is stored")
 	flag.Parse()