added debian support and ressource to manage groups
bug fix when several group are present
Merge pull request #2 from alkivi-sas/master

Same as previously, but working :)
Changed license to LGPL v3
Version bump
* Add package_require parameter and set default for RedHat to be Yumrepo[epel]
* Add clush_conf_dir parameter
* Add groups_dir to manage groups.conf.d
* Add include_slurm_groups to optionally include default slurm.conf groups
* Require epel module
* Remove conditions used to set config file content parameter
* Fix variable scope for some variables in clustershell::params
* Add unit tests
* Move all inline docs from init.pp to README.md
Update to incorporate latest changes from geoffjay/puppet-clustershell