Add a demo.bat file to the examples directory on Windows

And a new console demo program: taxi and passengers simulator

win32/examples/demo.bat

@@ -0,0 +1,22 @@
+@echo off
+
+@rem Compute 10th Fibonacci number
+tcc fib.c
+fib 10
+del fib.exe
+
+@rem hello_win.c
+tcc hello_win.c
+hello_win
+del hello_win.exe
+
+@rem 'Hello DLL' example
+tcc -shared dll.c
+tcc hello_dll.c dll.def
+hello_dll
+del hello_dll.exe dll.def dll.dll
+
+@rem a console threaded program
+tcc taxi_simulator.c
+taxi_simulator
+del taxi_simulator.exe