strips out the createflags interface from the none driver

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>
adds int & bool to the driver options interface

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>
reintroduces the virtualbox driver

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>
converts the virtualbox driver to use the new interface for flags

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>
converts the azure driver to use the flags interface

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>
reintroduces the do driver with all cli changes

Signed-off-by: Simon Thulbourn <simon+github@thulbourn.com>