Added basic window example

examples/basicwindow/basicwindow.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"github.com/andlabs/ui"
+	"log"
+)
+
+func main() {
+
+	go ui.Do(gui)
+
+	err := ui.Go()
+	if err != nil {
+		log.Print(err)
+	}
+}
+
+func gui() {
+
+	// Here we create a new space
+	newControl := ui.Space()
+
+    // Then we create a window
+	w := ui.NewWindow("Window", 280, 350, newControl)
+	w.OnClosing(func() bool {
+		ui.Stop()
+		return true
+	})
+
+	w.Show()
+}