added nginx support: first working version
added integration tests for nginx
certificate file generation moved to a helper library
README and metadata: added new attributes documentation related with nginx and SSL.
CentOS support fixed: added server aliases support, php-fpm service launched with the correct user
README: Added nginx depend
webserver attribute checking logic simplified
PHP-FPM installation moved to its own recipe
Internal recipes renamed to have "_" prefix
PHP-FPM pool name attribute added, integration with php-fpm cookbook improved
README: added php-fpm depend
set nginx vhost as default on nginx versions < 0.8.21, required by ssl flag
Merge branch 'nginx'