Boot stages and Error Logs instead of whole dmesg/logcat

[MarkusTieger]

To make it a little more useful and more unix-like: I think it would be better if you only see the successful boot stages in a systemd style and ofc. all error messages. At the current version, there are so many messages, that you can't read them all.

That means like so: (Image from Wikipedia)

There was already a discussion about this in the "symbuzzer/livebootmodule" repository. -> https://github.com/symbuzzer/livebootmodule/issues/7