Add rudimentary unit testing via AIN file

Building 'test/test.pje' with the SDK compiler produces a file at
'test/Run/test.ain' which can be run with xsystem4 to test various
features.

Not the greatest testing method, but it works.

test/Source/System/System42/System42.inc

@@ -0,0 +1,9 @@
+
+CopyToRun = {
+	"System40.exe",
+	"System40.ini"
+}
+
+CopyToDLL = {
+	"DLL\Sys42VM.dll",
+}