version 4.1.0

maybe fix hang on PIEthernet::interrupt()
replace piLetobe with piChangeEndian:
 * piChangeEndianBinary
 * piChangeBinary
 * piChangedBinary
PIDiagnostics::start now accept PISystemTime instead of number
add PITimer::start(PISystemTime, std::function<void()>) overload

libs/main/io_utils/pidiagnostics.h

@@ -96,7 +96,7 @@ public:
 
 
 	EVENT_HANDLER0(void, start);
-	EVENT_HANDLER1(void, start, double, msecs);
+	EVENT_HANDLER1(void, start, PISystemTime, interval);
 	EVENT_HANDLER0(void, reset);
 
 	EVENT_HANDLER1(void, received, int, size) { received(size, true); }