Fixed all warnings with Xcode 5.1.
Made table columns in the Open Drive window non-editable.
For Open Drive filter out disks that represent network volumes.
Open Drive: cleaned up code. Fixed thread safety issues. Remove drives from the list when they’re removed from the system.
Sort drives by their BSD name.
For whole disks (non-slices/partitions) show the drive name.
More clean up to Open Drive nib.
Merge pull request #29 from kainjow/master

Fixed Xcode 5.1 warnings and cleaned up Open Drive