[sensors] Naming of derivative sensors are very inconsistent

kenchris has just created a new issue for 
https://github.com/w3c/sensors:

== Naming of derivative sensors are very inconsistent ==
1. Multiple sensors are ambient, so when should we prefix Ambient or 
not.
2. Some use more human readable names (AmbientLightSensor), some don't
 (Accelerometer).

AmbientHumiditySensor vs Hygrometer[Sensor] vs Hygrostat[Sensor]
AmbientTemperatureSensor vs Thermometer[Sensor] vs Thermostat[Sensor]
AmbientPressureSensor vs Barometer[Sensor] vs BarometricSensor
AmbientLightSensor vs Photodetector


Please view or discuss this issue at 
https://github.com/w3c/sensors/issues/131 using your GitHub account