Sensors: added Wahoo Blue SC.
Please note that the according to the specification these sensors _may_ provide speed as well as cadence.
However, often only one value is provided.
-### Speed
+### Speed & Cadence
+
+* Wahoo Blue SC
+
+### Speed only
* Garmin Speed Sensor 2
* Has updatable firmware that requires an account for garmin.com
* Wahoo Speed (Model: WFRPMSPD)
* CooSpo cadence and speed sensor (model: BK467)
-### Cadence
+### Cadence only
* Garmin Cadence Sensor 2
* Wahoo Cadence (Model: WFPODCAD2)
