First version with multi telegram support

These commits consists of:

- all changes since 0.7.0
- merge of rscada-0.7.X with multi telegram support and a few changes
- a new binary to change baudrate of a M-Bus slave (currently untested)
- binary dump of manufacturer specific data in XML-Output
- removed unused variables and broken declarations
- better error messsages in mbus_parse_hex .