Add TKB TZ68 to product database
Add Merten 506004 to product list
Add check to ensure config file exists
Update logging.
Merge pull request #907 from cdjackson/zwave-product

Updated product references for KFOB and FGBS101
Improvements to FritzBox exception logging (untested)
Improvements to MQTT connection exception logging (untested)
Merge pull request #892 from sumnerboy12/improve_mqtt_exception_handling

Improvements to MQTT connection exception logging (untested)
Merge pull request #891 from sumnerboy12/improve_fritzbox_exception_handling

Improvements to FritzBox exception logging (untested)
Ignore NO_OP when correlating command classes
Initial commit of FGRM222 in product database
Fix bug in decapsulation of multi instance command class offset. Update logging.
Update logging when command classes added. This makes the logging more correct by not logging the event every time the application message is received.
Updated multi instance command class logging to make it better for debugging.
Updated logging
Send NAK to controller on startup to synchronise communications.
Updated transaction handling
Create fgr221.xml

Adding support for FGR 221 Roller Shutter
Merge remote-tracking branch 'upstream/master' into maxcube
MAX!Cube Binding refactoring

fixed issue with wrong S_Command set point encoding,  added
suppressWarnings statement due to Date usage, restructured up
conditional statements due to merge with forks.