Merge pull request #40 from oniko/pull-requests

- extend subvolume instance validity for StreamProcessor.process()
- fixed execution of grub scripts by removing unused constructor
Merge pull request #41 from aschnell/master

- fixed execution of grub scripts by removing unused constructor
- cleanup
Merge pull request #42 from aschnell/master

- cleanup
- added obsoletes
Merge pull request #43 from aschnell/master

- added obsoletes
- sync ACL at startup (bnc#863073)
Merge pull request #44 from aschnell/master

- sync ACL at startup (bnc#863073)
- fixed error name
Merge pull request #45 from aschnell/master

- fixed error name
- add 'norecovery' among xfs mount options