Merge pull request #2 from xmj/master

Bugfix: Wait for bhyveload to time out before continuing
Clean up xmj@'s suffix patch, add a prefix, use it everywhere
Bugfix: Wrap bhyve(8) call in eval.

For nohup+shell redirection to work, evaluate the whole bhyve command before
executing.

Stderr/out redirection won't work otherwies.