PIObject::deleteLater important fix

PIWaitEvent::sleep() method
PITimer thread imp wait optimization, migrate to interruptable sleeps

main.cpp

@@ -3,6 +3,7 @@
 #include "pibytearray.h"
 #include "pimathbase.h"
 #include "pijson.h"
+#include "piwaitevent_p.h"
 
 using namespace PICoutManipulators;
 
@@ -88,6 +89,21 @@ void phase(const char * msg) {
 int main(int argc, char * argv[]) {
 	piCout << "main";
 
+	PITimer timer;
+	timer.setSlot([](){
+		static int cnt = 0;
+		piCout << "tick" << ++cnt;
+	});
+	timer.start(500);
+
+	piSleep(1.12);
+	piCout << "end";
+	PITimeMeasurer tm;
+	timer.stop();
+	double tm_ms = tm.elapsed_m();
+	piCout << "stop took" << tm_ms;
+	return 0;
+
 	/*for (int i = 0; i < count; ++i)
 		pipes[i].create();