Implement cryptOpen/cryptClose/mount/unmount operations.
detectFileSystem, which only uses blkid, is now in FileSystem.cpp.
FileSystem::mount now requires a mountPoint.
Use umount -A to immediately umount all mount points in unmountCmds.
Add override keywords, TODO: add them everywhere.
LibPartedBackend no longer links against libblkid.
Fix LUKS handling in LibPartedBackend::scanDevicePartitions.