* Now the package is loaded using a
[PSR-4](http://www.php-fig.org/psr/psr-4) autoloader instead of a 
   [PSR-0](http://www.php-fig.org/psr/psr-0) autoloader
 * Use [PHP_CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer)
to ensure the code is compliant with 
   [PSR-0](http://www.php-fig.org/psr/psr-0) and
[PSR-2](http://www.php-fig.org/psr/psr-2) coding rules
 * Upgrade Grunt dependency `grunt-phpunit`
 * Now the code is compliant with
[PSR-0](http://www.php-fig.org/psr/psr-0) and 
   [PSR-2](http://www.php-fig.org/psr/psr-2) coding rules
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\ADM` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\Android` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\IOS` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\Mac` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\Safari` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\WNS` class
 * Reorganize attributes and functions in the
`Gomoob\Pushwoosh\Model\Notification\WP` class
 * Updates the coding conventions in the `README.md` file
 * Append indications for Pull Requests in the `README.md` file
 * Ignore the `composer.lock` file from GIT