Wrap the classes in the according namespace

[floriandammeyer]

I found the ZipStream class very helpful in one of my current projects. Unfortunately the class resides in the global namespace in the original code, which didn't really go well with the folder structure and module system of the Zend Framework, so I had to wrap it in a namespace for the PHPZip "module". In my project the class is now accessible as \PHPZip\ZipStream.
I recommend you to adopt this to the original source code to make it PSR-0 compliant (https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md). Using your small "library" in bigger frameworks would become much easier and your project would fit to currently modern naming conventions.