Development

Added readme, composer.json and fixed .gitignore.
Should rename vendor and register with packagist for release.

Advantages of this patch are
* it is documented
* it is trivial to install with a single line to `require-dev` of any composer.json

Test with
```json
{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/goatherd/PHP52to53"
        }
    ],
    "require": {
        "goatherd/php52to53": "dev-master"
    }
}
```
And query `./vendor/bin/phpcs -i`.

The *repository* part is needed only since it is not registered with packagist yet.


Futher psr2 compliance was enforced (including namespaces). You  may thus want to run the testsuite too.