Modify output assignment to use first element of returned tuple (value)

Update output values to use the first element from range_slicer rather than both values from the returned tuple.

Author: CedarGroveStudios

README.rst

@@ -99,8 +99,8 @@ Usage Example
         control_1 = pot_1.value
 
         # calculate output values and print (or plot in Mu)
-        out_0 = ctrl_0.range_slicer(control_0)
-        out_1 = ctrl_1.range_slicer(control_1)
+        out_0 = ctrl_0.range_slicer(control_0)[0]
+        out_1 = ctrl_1.range_slicer(control_1)[0]
         print( (control_0 / 65535, control_1 / 65535, out_0, out_1) )
 
         time.sleep(0.1)  # pause for 0.1 second