v0.14.5

This a bug fix (bcache) and mdev clean up.

• (Trivial) fix of bcache hooks and added basic support in init
  (ibcache argument will properly execute the hook);
• Cleaned up mdev scripts mess and added dm_link
  to take care of device-mapper link (in /dev/mapper);
  apparently, lvm has a hard dependency on udev
  (it does not matter with 0.14.4 updates and this one);
• Reverted putting shm on ext4 zram backed device.

The complete diff is over there.