Bhyve/FreeBSD support

[samm-git]

Hi,

I found your project when was looking on bhyve driver support in the FreeBSD docker-machine. I did not found any implementation but i think that your plugin could be a good starting point because of many shared properties between bhyve/xhyve.

Do you think it would be better to fork your project and create an in-depended plugin or to work in the same codebase? May be you aware of some efforts already exists to run linux docker on FreeBSD host without using virtualbox driver?