如何使用稳定版的Zend 2.2.0框架？

I have just started to explore ZF2 framework for my project. Please note that I have not worked with ZF1 framework also.

Problem:

I want to know the way/method/steps to install a stable version Zend framework 2.2.0.

Things Done:

I am able to install ZEND skeleton application by following the documentation PDF i.e. from GitHub however I am not able to locate the steps to download zend stable version from site and use it on local. This has downloaded framework is showing version >2.2.0 RC1. I am not very much sure about how much it is stable since zend framework itself stated it as release candidate.

I have used the steps described in PDF document with downloaded zend framework however after executing composer update and install there were no public directory got installed in root directory.

Please let me know if there is any steps to use stable version of Zend Framework using which I can build my application OR I must have to use 2.2.0 RC1 provided by zend skeleton application from Github.

Thanks in Advance.

try this composer.json

{
    "name": "zendframework/zendframework",
    "description": "Zend Framework 2",
    "license": "BSD-3-Clause",
    "keywords": [
        "framework",
        "zf2"
    ],
    "minimum-stability": "dev",
    "homepage": "http://framework.zend.com/",
    "require": {
        "php": ">=5.3.3",
        "zendframework/zendframework": "dev-master",
        "zendframework/zend-developer-tools": "dev-master",
        "doctrine/annotations": ">=1.0",
        "ircmaxell/random-lib": "dev-master",
        "ircmaxell/security-lib": "dev-master",
        "ocramius/proxy-manager": "0.3.*",
        "phpunit/PHPUnit": "3.7.*"
    },
    "autoload": {
        "psr-0": {
            "Zend\\": "library/",
            "ZendTest\\": "tests/"
        }
    }
}

I prefer to use some stable libraries like:

"zendframework/zendframework": "2.1.5",