Please, add compile and install instructions on the README

[jaimemrjm]

git clone git://github.com/Evinyatar/atvclient.git
cd atvclient
./configure && make
sudo make install

and for old init systems like in Ubuntu 14.04:

sudo cp atvclient /etc/init.d/atvclient
sudo update-rc.d atvclient defaults
sudo /etc/init.d/atvclient start