add empty VHD image
copy stuff to VHD file, too
deploy VHD file
force rebuild
Reconcile

[ci skip]
store empty VHD compressed to perhaps reduce setup time
unmount VHD before compressing
force rebuild
don't use unsupported -k switch to gunzip
Reconcile

[ci skip]
Merge branch 'master' into 13-vhd
Merge pull request #15 from krlmlr/13-vhd

Publish VHD image