raplayer v2.1

1. Improved the 20ms_opus_timer to be more sophisticated.
2. Modified CMakeLists.txt for Use latest portaudio.

raplayer v2.0

1. Multiple client connections.
2. Sending audio per client. (Server)
3. Audio Packet en/decode.
4. Audio Packet en/decrypt.
5. Audio volume control. (Client)

raplayer v1.1

All environments are fully supported!

1. Sending audio.
2. Audio Packet en/decode.
3. Audio Packet en/decrypt.
4. Audio volume control.
5. Various bugs fixed.

raplayer v1.0

Windows: Client, Server(.wav file only) mode supported.
Linux: Client, Server mode supported.
macOS: Client mode supported, Server mode not supported yet(cause segmentation fault).

1. Sending audio.
2. Audio Packet en/decoding.
3. Audio Packet en/decrypt.