Download the latest commit from master branch to get updates. No stable release exists at the moment as Stingray is still in early development stage.
Stingray requires SDL2 and libav/ffmpeg (libavcodec, libavformat, libavutil)
On debian / ubuntu :
apt-get install libavcodec-dev libavformat-dev libavutil-dev libsdl2-dev
The usual should do :
./configure
make
sudo make install