Add normalized values option -n
Add file pointer check after fread
Add additional check if directory is empty or hex file doesn't exists
Add new test frames from Elster Falcon and Relay Padpuls

Signed-off-by: Stefan Wahren <info@lategoodbye.de>
Fix mbus_vib_unit_lookup
remove unreachable code
add missing unit password
fix typo

Signed-off-by: Stefan Wahren <info@lategoodbye.de>
Merge pull request #57 from lategoodbye/master

New option for normalized output, new test frames, unit fix