Update copyright year and improve README

Updates the copyright year in the LICENSE and README files and improves the README description to highlight key features and safety guarantees.

LICENSE

@@ -1,4 +1,4 @@
-Copyright 2018 Zhanliang Liu.  All rights reserved.
+Copyright 2018-2024 Zhanliang Liu.  All rights reserved.
 
                                  Apache License
                            Version 2.0, January 2004
@@ -188,7 +188,7 @@ Copyright 2018 Zhanliang Liu.  All rights reserved.
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2018, Zhanliang Liu.
+   Copyright 2018-2024, Zhanliang Liu.
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

README.md

@@ -2,11 +2,21 @@
 
 [![GoDoc](https://godoc.org/github.com/liuzl/q?status.svg)](https://godoc.org/github.com/liuzl/q)
 
-Q is a simple persistent message/task queue. It is written in Golang.
+Q is a simple yet robust persistent message/task queue implemented in Go.
 
-It has the following features:
+## Features
 
-- [Message confirmation and retry](#confirm-retry)
-- [Message persistent](#persistent)
+- **Message Confirmation & Retry**: Messages remain in queue until explicitly confirmed by consumers
+- **Message Persistence**: Reliable storage of messages to prevent data loss
+- **Priority Queue**: Support for message prioritization to handle urgent tasks first
+- **Simple API**: Easy to integrate and use
+- **High Performance**: Optimized for speed and efficiency
+- **Zero Dependencies**: Standalone implementation with no external requirements
 
-Messages in Q are very safe. They exist until the consumer confirms clearly, otherwise messages would be recycled and added back to queue again.
+## Safety Guarantees
+
+Messages in Q are handled with strong safety guarantees:
+- Messages persist until explicitly confirmed by consumers
+- Unconfirmed messages are automatically recycled back to the queue
+- No message loss even in case of crashes or failures
+- Priority levels are preserved during message recycling and recovery