Merge pull request #6 from peerrabe/master

ftp_rawlist support added
Update FtpClient.php

Asort triggers error if nlist fails. Move it under the exception
Merge pull request #7 from joegreen0991/patch-1

Update FtpClient.php
allow passive mode to be activated without being connected already

* for dependency injection
add passive mode handling after login
use member for binary mode handling
add readme entry