Rework:
* Pull metadata obtaining code apart from interpretation; we need this to be able to read meta off anything and anywhere in order to support foreign metadata formats
* Normalize IO collisions for all RAID levels instead of dealing with it in RAID driver (Done); this needs to be able to be reused by the rebuild functions

New:
* Add support for partial volume bring up
* Add rebuild completion % so that reboots will not be cause a full rebuild but can be resumed; this needs to be saved in the metadata
* Figure out how to deal with dirty volumes without crippling the system upon boot
* Add crypto key management to bioctl
* Add rebuild to bioctl and softraid; rebuild == initialize
* Add quiesce code to midlayer; this has to be a invoked by softraid driver
* Add RAID 5
* Add RAID n-1 (like raid 6 but with variable parity instead of fixed to 2)
* Add RAID c (concat)
* Add multiple level RAID support, e.g. RAID 10, 50 etc
* Add iSCSI
* Merge tedu's AOE code