Switch to OASIS, replace vhdlib with ocaml-vhd

Not everything is implemented yet in particular
 * creating with extra space for resized BATs
 * rewriting parent locators
 * reading or setting the 'hidden' flag

Signed-off-by: David Scott <dave.scott@citrix.com>
Replace 'or' with '||'

Signed-off-by: David Scott <dave.scott@citrix.com>
Improve command-line parsing and add a manpage

Signed-off-by: David Scott <dave.scott@citrix.com>
Allow the state_path to be overriden by the commandline/config file

Signed-off-by: David Scott <dave.scott@citrix.com>
Rename ChangeLog to CHANGES

Signed-off-by: David Scott <dave.scott@citrix.com>
Hook up resize and set_parent

Signed-off-by: David Scott <dave.scott@citrix.com>
Add OASIS detritus

Signed-off-by: David Scott <dave.scott@citrix.com>
We require vhd-format >= 0.7.2

Signed-off-by: David Scott <dave.scott@citrix.com>
Update CHANGES for 0.9.25

Signed-off-by: David Scott <dave.scott@citrix.com>
Update CHANGES, release 0.9.25

Signed-off-by: David Scott <dave.scott@citrix.com>
Add minimal travis configuration

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #3 from djs55/fixes

Replace vhdlib with ocaml-vhd