Auth draft

This bundle will allow user to login and/or register to FOSUserBundle via Google oAuth 2.0

For now, just before merging, installation is possible by adding to composer.json: 

    "autoload": {
            "psr-0": {
                "": "src/",
                "Xsolve\\GoogleAuthBundle": "vendor/piotrpasich/xsolve-google-auth-bundle"
            }
        },
    "require": {      
            "piotrpasich/xsolve-google-auth-bundle": "dev-master"
    },
    "repositories": [
        {
            "type": "package",
            "package": {
                "name": "piotrpasich/xsolve-google-auth-bundle",
                "version": "master",
                "source": {
                    "url": "git@github.com:piotrpasich/xsolve-google-auth-bundle.git",
                    "type": "git",
                    "reference": "master"
                },
                "target-dir" : "Xsolve/GoogleAuthBundle"
            }
        }
    ]