[modules/sensors] Use thermal zone, if specified on commandline

fixes #298

bumblebee/modules/sensors.py

@@ -32,6 +32,10 @@ class Module(bumblebee.engine.Module):
         self.determine_method()
 
     def determine_method(self):
+        if self.parameter("path") != None:
+            self.use_sensors = False # use thermal zone
+        else:
+            # try to use output of sensors -u
             try:
                 output = bumblebee.util.execute("sensors -u")
                 self.use_sensors = True