Add some very basic examples

examples/blank/main.go

@@ -0,0 +1,18 @@
+package main
+
+import "image"
+import "git.tebibyte.media/tomo/x"
+import "git.tebibyte.media/tomo/tomo"
+
+func main () {
+	tomo.Register(0, x.NewBackend)
+	err := tomo.Run(run)
+	if err != nil { panic(err) }
+}
+
+func run () {
+	window, err := tomo.NewWindow(image.Rect(0, 0, 200, 300))
+	if err != nil { panic(err) }
+	window.OnClose(tomo.Stop)
+	window.SetVisible(true)
+}