Chain calls to ByteBuffer
Removed unused imports
Finalize fragment arrays
Refactored to make code cleaner
Return actual device mac address
Removed unused resources
Overloaded tryParse to allow new BusMessage without checking checksum. Needed for next commit.
Checksum validation moved into process method two avoid having two loops over same data in different places. tryParse call is made with true boolean indication that checksum validation is not needed.