add build with Dockerfile
Merge remote-tracking branch 'upstream/master' into feature/readme-update-build
Merge pull request #5 from aheissenberger/feature/readme-update-build

readme / howto build with Dockerfile
Fixed README formatting
Minor fix to make `go tool vet` happy
Simplified cmdRestart()
Download ISO image and make disk image first before create VM
making the output file the same name as the source directory makes life hard :)
Merge pull request #15 from SvenDowideit/stop-removing-the-code

making the output file the same name as the source directory makes life ...