AirplayServer for Linux

Work is based on https://github.com/FD-/RPiPlay and https://github.com/antimof/UxPlay
Tested on Ubuntu 18.04 desktop.
Requires 5G Wifi connection.

Features:
1. Based on Gstreamer.
1. Video and audio are supported out of the box.
3. Gstreamer decoding is plugin agnostic. Uses accelerated decoders if availible. VAAPI is preferable.
4. Automatic screen orientation.
5. No source timesync by now.
6. GTK+ support

Building:
1. sudo apt-get install cmake
2. sudo apt-get install libssl-dev libavahi-compat-libdnssd-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev gstreamer1.0-libav libglib2.0-dev libgtk2.0-dev
3. sudo apt-get install gstreamer1.0-vaapi (For Intel graphics)
4. sh install.sh
