I find it very convenient for testing to have altering values within the sensor sketches, as it is easier to see if new values are arriving. Therefore replaced the fixed humidity value to a random value between 0-100.
* keywords.txt (for syntax highlighting), library.properties (for a proper description added
* moved Universal_Sensor_beta to the examples directory
* moved Sensors, FDRS_Sensor and FDRS_Gateway to resources folder. They contain documentation which needs to be kept (to be discussed where to put that later on) but are fully redundant as they are just duplicates of the different sensors / gateways in the examples folder.
