Adding PHP 5.6 to build matrix
Adding PHP 5.6 to build matrix

Ocramius/ProxyManager,malukenho/ProxyManager,pascaldevink/ProxyManager,malukenho/ProxyManager,localheinz/ProxyManager,localheinz/ProxyManager,localheinz/ProxyManager,huang-lu/ProxyManager,pascaldevink/ProxyManager,pascaldevink/ProxyManager,malukenho/ProxyManager,huang-lu/ProxyManager,huang-lu/ProxyManager