First fixes and commands for subvolumes:
list, create
Subvolumes...

More commands for subvolumes and snapshots
Some option fixes for commandline tools
Subvolumes...

Some fixes for commands
Add table for subvolumes.
Update subvolume operations
Merge master updates

Merge remote-tracking branch 'origin/master' into snapshot-management

Conflicts:
	dedupsqlfs/app/do.py
Fix subvolume name creation, Fix storage initiation
Update commandline options, add subvolume usage report
Update commandline options, update subvolume operations
Add snapshot commands, fix subvolume name process, fix storage init
Try to fix data corruption - something happens if compression enabled
Fixed data save with compression:

- fixed wrong compression type storage
- fixed cache storage
- fixed data vacuum
- fixed snapshot creation
Merge branch 'snapshot-management'

Conflicts:
	dedupsqlfs/fuse/operations.py