Simplified switch statement

Feeling stupid now...
Adjusted code style to be idiomatic Go

Kudos to @bradfitz!
Correctly report errors from os.Stat()
Correct capitalization
More capitalization fixes!
Report errors from VBoxManage
Simplified VM state handling
Further simplified VM state handling
Merge branch 'master' into go

Conflicts:
	boot2docker.go
Adjusted Go code style
Merge pull request #203 from riobard/go

A bunch of improvements to boot2docker.go