Safer file handling using temp files
Simplified VMDK image creation process
Merge branch 'master' into go
cmd*() funcs are now paremeter-less

Rely on the global B2D struct for config.
Bugfix: `up` wait until SSH server is responsive
Renamed SSHHostPort to SSHPort

To be consistent with DockerPort, as both are on the host.
Print port forwarding info during `init`
Merge pull request #219 from riobard/go

Improved boot2docker.go