Change detection 'invert' to 'activeLow'

This more accurately describes what the constructor is *asking*, if not how the code actually works.

Author: dmadison

src/SimRacing.cpp

@@ -176,9 +176,9 @@ static void readFloat(float& value, Stream& client) {
 //                  DeviceConnection                      #
 //#########################################################
 
-DeviceConnection::DeviceConnection(PinNum pin, bool invert, unsigned long detectTime)
+DeviceConnection::DeviceConnection(PinNum pin, bool activeLow, unsigned long detectTime)
 	:
-	pin(sanitizePin(pin)), inverted(invert), stablePeriod(detectTime),  // constants(ish)
+	pin(sanitizePin(pin)), inverted(activeLow), stablePeriod(detectTime),  // constants(ish)
 
 	/* Assume we're connected on first call
 	*/

src/SimRacing.h

@@ -75,12 +75,13 @@ namespace SimRacing {
 		/**
 		* Class constructor
 		*
-		* @param pin the pin number being read. Can be 'UnusedPin' to disable.
-		* @param invert whether the input is inverted, so 'LOW' is detected instead of 'HIGH'
+		* @param pin        the pin number being read. Can be 'UnusedPin' to disable.
+		* @param activeLow  whether the device is detected on a high signal (false, 
+		*                   default) or a low signal (true)
 		* @param detectTime the amount of time, in ms, the input must be stable for
-		*        before it's interpreted as 'detected'
+		*                   before it's interpreted as 'detected'
 		*/
-		DeviceConnection(PinNum pin, bool invert = false, unsigned long detectTime = 250);
+		DeviceConnection(PinNum pin, bool activeLow = false, unsigned long detectTime = 250);
 
 		/**
 		* Checks if the pin detects a connection. This polls the input and checks