Replaced preg_replace() with preg_replace_callback() in Hull/Connection.php
This due to preg_replace() with the /e option being deprecated in php 5.5.0 & throwing an exception
Change creates compatibility with php 5.5.x
Change breaks compatibility with php 4 < 4.0.5
Merge pull request #2 from twoSeats/php5-5-x-compatibility-fix

Replaced preg_replace() with preg_replace_callback() in Hull/Connection.php