Merge pull request #10 from avsm/master

Sync with mirage-types-0.4.0
Merge pull request #11 from avsm/master

v1.0.0 of mirage-block-unix
Expose the low-level function blkgetsize

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #12 from djs55/more-low-level

Expose the low-level function blkgetsize
Regenerate build files with OASIS 0.4.0, and bump ver to 1.1.0