add build with Dockerfile
Merge remote-tracking branch 'upstream/master' into feature/readme-update-build
copy binary to subfolder
Merge pull request #10 from aheissenberger/fix/Dockerfile-bin-repaces-directory

fixed the copy command to not replace the existing src directory
default to short command help and add help command for log info and error msg for not existing commands
Merge pull request #14 from aheissenberger/feature/help-cmd

default to short command help
Removed redundent COMMNAD from short usage info
More git-style command line help syntax
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 ...