Make the hostgroup setting work
Remove oj dependency

because it is hard to package so standard json'll be used. Dynflow will
include workaround after merging
https://github.com/Dynflow/dynflow/pull/112
Merge pull request #57 from pitr-ch/master

Remove oj dependency
Print logger WARN message instead of raising an error
Merge pull request #55 from ares/setting_fix

Make the hostgroup setting work
Merge pull request #58 from pitr-ch/master

Print logger WARN message instead of raising an error
version bump
Merge pull request #59 from pitr-ch/master

version bump