adds vendor directory

vendors dependencies in standard `vendor` directory, managed by glide

vendor/github.com/mattn/go-gtk/example/alignment/alignment.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"github.com/mattn/go-gtk/gtk"
+	"os"
+)
+
+func main() {
+	gtk.Init(&os.Args)
+	window := gtk.NewWindow(gtk.WINDOW_TOPLEVEL)
+	window.SetTitle("Alignment")
+	window.Connect("destroy", gtk.MainQuit)
+
+	notebook := gtk.NewNotebook()
+	window.Add(notebook)
+
+	align := gtk.NewAlignment(0.5, 0.5, 0.5, 0.5)
+	notebook.AppendPage(align, gtk.NewLabel("Alignment"))
+
+	button := gtk.NewButtonWithLabel("Hello World!")
+	align.Add(button)
+
+	fixed := gtk.NewFixed()
+	notebook.AppendPage(fixed, gtk.NewLabel("Fixed"))
+
+	button2 := gtk.NewButtonWithLabel("Pulse")
+	fixed.Put(button2, 30, 30)
+
+	progress := gtk.NewProgressBar()
+	fixed.Put(progress, 30, 70)
+
+	button.Connect("clicked", func() {
+		progress.SetFraction(0.1 + 0.9*progress.GetFraction()) //easter egg
+	})
+	button2.Connect("clicked", func() {
+		progress.Pulse()
+	})
+
+	window.ShowAll()
+	window.SetSizeRequest(200, 200)
+
+	gtk.Main()
+}