Update README.md

Signed-off-by: Thomas Dietrich <[email protected]>

Finalize for release

Signed-off-by: Thomas Dietrich <[email protected]>

Make serial port menu more flexible

Signed-off-by: Thomas Dietrich <[email protected]>

Fix endless echo additions, add docu to 1wire

Add about, add a few more outputs

Fix minor details

Activate FireMotD

Remove raspbian-ua-netinst documents