Pipette and "On Preview Widgets" branch. See issue 227

The pipette part is already working quite nice but need to be finished. The widgets part needs more work...

rtengine/klt/main.cpp

@@ -0,0 +1,30 @@
+// main.cpp : Defines the entry point for the console application.
+//
+
+#include <cstdio>  // printf
+
+extern "C" {
+	void RunExample1();
+	void RunExample2();
+	void RunExample3();
+	void RunExample4();
+	void RunExample5();
+}
+
+int main(int argc, char* argv[])
+{
+	// select which example to run here
+	const int which = 1;
+
+	// run the appropriate example
+	switch (which) {
+	case 1:  RunExample1();  break;
+	case 2:  RunExample2();  break;
+	case 3:  RunExample3();  break;
+	case 4:  RunExample4();  break;  // Note:  example4 reads output from example 3
+	case 5:  RunExample5();  break;
+	default:  printf("There is no example number %d\n", which);
+	}
+	return 0;
+}
+