Fixed the configuration system for sensor nodes. Gateway nodes are still to be fixed (work still in process :) )
This has been addressed in #71
Important: For this system to work and make the onboarding easier for new users, global settings must be used by default and therefore local settings must be commented out by default.
Added Id and data content to debug message.
Also changed the order to meet the serial debug output of the gateway - this way it is much easier to check if what has been sent is what has been received.
This needs to be checked, especially in the new class-based model of sensors and gateways: First the global settings must be checked and the corresponding local settings for a sensor / gateway commented out.
Then either the one or other is saved in a FDRS_prefix variable. After that checks must soley be done against FDRS_variables.
Changed those values to be prevent compiling issues with PlatformIO and also as it is good practice not to use names which easily could collide with other libs.
Also removed a duplicate line from keywords.txt
