Simplified way to get Shairport-sync works in your raspberry pi

The tutorial here is quite straight forward.
Sometimes you do need "fast-track" to get something done right away.

For deep diving purpose, please head to https://github.com/mikebrady/shairport-sync for full (useful) explanation about the setup.

The steps below was tested and might only work for:
- New installation (with no shairport-sync installed before)
- Raspbian (version 8, Jessie) check with cat /etc/os-release
- no external sound card attached (my case)
- tested on streaming through iTune from Macbook (macOS Sierra, 10.12.1)

I'm too will look for the simplest (easiest) approach first, so don't guilt about it, let's get start.

1. As usual, update your rpi first
1. sudo apt-get update & sudo apt-get upgrade
2. sudo rpi-upgrade
2. Install dependencies,
1. sudo apt-get install build-essential git autoconf automake libtool libdaemon-dev libasound2-dev libpopt-dev libconfig-dev libpolarssl-dev libssl-dev avahi-daemon libavahi-client-dev
3. Download/clone shairport-sync and configurations
1. git clone https://github.com/mikebrady/shairport-sync.git
2. cd shairport-sync
3. autoreconf -i -f
4. sudo ./configure --sysconfdir=/etc --with-alsa --with-avahi --with-ssl=openssl --with-metadata --with-systemd
5. sudo make
6. sudo getent group shairport-sync &>/dev/null || sudo groupadd -r shairport-sync >/dev/null
7. sudo getent passwd shairport-sync &> /dev/null || sudo useradd -r -M -g shairport-sync -s /usr/bin/nologin -G audio shairport-sync >/dev/null
8. sudo make install
9. sudo systemctl enable shairport-sync
10. sudo update-rc.d shairport-sync defaults 90 10

I've got the shairport-sync working well in my Debian build raspberry pi. 

And hope to add more explanation about the steps above once I manage to spend more time playing shartport-sync in the rpi.

You should visit the references below:
A guide from setting up WiFi to shairport-sync - Multiroom audio Rpi (2015)
Use of shairport (earlier version of shairport-sync) and mentioned alsamixer - hifi audio via airplay on Rpi (2013)