Fix condition of hostgroup.puppetclasses being empty array
bump v0.0.5
Merge pull request #71 from jtomasek/service_params_fix2

Fix condition of hostgroup.puppetclasses being empty array
Accept empty host_ids
Fix deploy for bare metal hosts

It uses discovery image to reboot the machines. Is is ensured by
special discovery Environment which sets PXE boot template for all its
hosts to the global one configured for discovery plugin.
Better humanized output for Hostgroup::Deploy