Account for new config options

[treydock]

There are new config options is newer clustershell:

 color: auto
 fd_max: 8192
 history_size: 100
-maxrc: no
 node_count: yes
 verbosity: 1
-confdir: /etc/clustershell/clush.conf.d $CFGDIR/clush.conf.d

[glennmorris]

Hi, thanks for the module. Any chance of a new version that includes the updated config options?