Ansible is an open source automation tool. Installing ansible is simple for the latest version, to install a specific version follow the below steps
$mkdir ansible-test
$cd ansible-test
$wget https://pypi.python.org/packages/2f/d4/3a76a12463aebc006bce192e5e3de3a48d2a419bccb946849b10b3e27373/ansible-1.7.tar.gz#md5=367d63ff316ee38c7e51b48a8f598327
$tar vxf ansible-1.7.tar.gz
$cd ./ansible-1.7
$make
There you go! You've installed ansible 1.7! To go ahead check ansible docs http://docs.ansible.com/ansible/intro_getting_started.html