geometry changes/fixes/new features

new grid walkers + fixes
new test-cases
worked on step/and turn detection
android offline-data-reader
worked on vap-grouping

sensors/radio/VAPGrouper.h

@@ -16,6 +16,9 @@ public:
 	/** the mode denotes the algorithm that is used for grouping VAPs together */
 	enum class Mode {
 
+		/** do NOT group */
+		DISABLED,
+
 		/** group VAPs by setting the MAC's last digit to zero */
 		LAST_MAC_DIGIT_TO_ZERO,
 
@@ -91,6 +94,7 @@ public:
 	MACAddress getBaseMAC(const MACAddress& mac) const {
 
 		switch(mode) {
+		case Mode::DISABLED:					return mac;
 		case Mode::LAST_MAC_DIGIT_TO_ZERO:		return lastMacDigitToZero(mac);
 		default:								throw Exception("unsupported vap-grouping mode given");
 		}