vendor dependencies, make some changes to how input is done

vendor/github.com/ebitengine/gomobile/app/app_windows.go

@@ -0,0 +1,13 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package app
+
+import (
+	"log"
+)
+
+func main(f func(a App)) {
+	log.Fatal("main is not implemented on Windows")
+}