refactored TIMEOUT
+ version 0.1.13  (version 0.1.12 not usable -> skipped)
+ added support for DHT33 + DHT44
+ added test sketches for DHT33 + DHT44
+ improved protocol handling
+ refactored code style,
+ refactored footprint (part interface inline)
+ renamed private _read => _readSensor
+ added dht_tuning sketch to see timing