Add php-gearman support

README.rst

 installed for RedHat systems, this is due to the curl libs being provided by
 php-common, which will get installed with the main php package.
 
+``php.ng.gearman``
+---------------
+
+Installs the php-gearman package.
+
 ``php.ng.fpm``
 --------------
 

php/ng/gearman.sls

+{% set state = 'gearman' %}
+{% include "php/ng/installed.jinja" %}

php/ng/map.jinja

                 'oauth': 'php5-oauth',
                 'apache2': 'libapache2-mod-php5',
                 'curl': 'php5-curl',
+                'gearman': 'php5-gearman',
                 'fpm': 'php5-fpm',
                 'hhvm': 'hhvm',
                 'gd': 'php5-gd',