Added support for EL6

Added in support for EL6, I also removed the purge of www.conf within the fpm directory since in a lot of use cases people would wish to create a pool with the name www.

Please note that I had to bundle a default fpm.conf file since the Ansible ini config file parser does not correctly handle parameters outside of a section and the CentOS default fpm.conf includes the pools directory outside of any section block.