added MPD Souce Code (#1540)

README.md

@@ -843,7 +843,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
   - [Moped](https://github.com/martijnboland/moped) - Responsive HTML5 + Javascript client for the Mopidy music server. `MIT` `HTML5`
   - [Mopidy MusicBox](https://github.com/pimusicbox/mopidy-musicbox-webclient) - Web Client for Mopidy Music Server. `Apache-2.0` `HTML5`
   - [Mopidy-Party](https://github.com/Lesterpig/mopidy-party) - Mopidy web extension designed for party! Let your guests manage the sound. `Apache-2.0` `Python`
-- [mpd](http://www.musicpd.org/) - Daemon to remotely play music, stream music, handle and organize playlists. Many clients available. `GPL-2.0` `C++`
+- [mpd](http://www.musicpd.org/) - Daemon to remotely play music, stream music, handle and organize playlists. Many clients available. ([Source Code](https://github.com/MusicPlayerDaemon/MPD)) `GPL-2.0` `C++`
   - [ympd](http://www.ympd.org/) - Standalone MPD Web GUI written in C, utilizing Websockets and Bootstrap/JS. ([Source Code](https://github.com/notandy/ympd)) `GPL-2.0` `C`
 - [mStream](http://mstream.io/) - Music streaming server with GUI management tools. Runs on Mac, Windows, and Linux. ([Demo](https://darncoyotes.mstream.io/), [Source Code](https://github.com/IrosTheBeggar/mStream)) `GPL-2.0` `Nodejs`
 - [Music Browser](https://github.com/henrik242/musicbrowser) - Browser and streamer for your music collection. It is runs on most operating systems, and is light enough to run flawlessly on NAS devices. `GPL-3.0` `PHP`