docker issue #3957 is not fixed for me by this, but it helps
Merge pull request #134 from SvenDowideit/dont-use-links

docker issue #3957 is not fixed for me by this, but it helps
detect if ports needed for SSH and DOCKER are free on localhost
add git to TCL
Merge pull request #139 from aheissenberger/fix/pull/add-git-to-iso

add git to TCL
Merge pull request #137 from aheissenberger/fix/pull/init-check-free-ports

detect if ports needed for SSH and DOCKER are free on localhost and fail to create the VM
add liblzma for xz
add req. libs for git
add req. lib for xz