Merge pull request #5 from EvaSDK/gentoo-support

Add support for Gentoo

syslog_ng/map.jinja

         'syslog_ng_config': '/etc/syslog-ng/syslog-ng.conf',
         'syslog_ng_config_src': 'salt://syslog_ng/files/syslog-ng.conf',
     },
+    'Gentoo': {
+        'package': 'app-admin/syslog-ng',
+        'service': 'syslog-ng',
+        'syslog_ng_config': '/etc/syslog-ng/syslog-ng.conf',
+        'syslog_ng_config_src': 'salt://syslog_ng/files/syslog-ng.conf',
+    },
     'RedHat': {
         'package': 'syslog-ng',
         'service': 'syslog-ng',