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

main.cpp

@@ -28,6 +28,11 @@ void tfunc4(int delim) {
 
 
 int main(int argc, char * argv[]) {
+	uint v = 0xaabbccdd;
+	piCout << Hex << v << piChangedEndian(v);
+	piChangeEndianBinary(&v, sizeof(v));
+	piCout << Hex << v << piChangedEndian(v);
+	return 0;
 	/*PIPackedTCP * tcp_s =
 		PIIODevice::createFromFullPath("ptcp://s::8000")->cast<PIPackedTCP>(); // new PIPackedTCP(PIPackedTCP::Server, {"0.0.0.0:8000"});
 	PIPackedTCP * tcp_c = PIIODevice::createFromFullPath("ptcp://c:127.0.0.1:8000")