Use a vendor directory for repeatable builds - fixes #816

This is using godep to manage the vendor directory.

vendor/google.golang.org/appengine/appengine.go

@@ -0,0 +1,78 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// Package appengine provides basic functionality for Google App Engine.
+//
+// For more information on how to write Go apps for Google App Engine, see:
+// https://cloud.google.com/appengine/docs/go/
+package appengine
+
+import (
+	"net/http"
+
+	"github.com/golang/protobuf/proto"
+
+	"google.golang.org/appengine/internal"
+)
+
+// IsDevAppServer reports whether the App Engine app is running in the
+// development App Server.
+func IsDevAppServer() bool {
+	// TODO(dsymonds): Detect this.
+	return false
+}
+
+// Context represents the context of an in-flight HTTP request.
+type Context interface {
+	// Debugf formats its arguments according to the format, analogous to fmt.Printf,
+	// and records the text as a log message at Debug level.
+	Debugf(format string, args ...interface{})
+
+	// Infof is like Debugf, but at Info level.
+	Infof(format string, args ...interface{})
+
+	// Warningf is like Debugf, but at Warning level.
+	Warningf(format string, args ...interface{})
+
+	// Errorf is like Debugf, but at Error level.
+	Errorf(format string, args ...interface{})
+
+	// Criticalf is like Debugf, but at Critical level.
+	Criticalf(format string, args ...interface{})
+
+	// The remaining methods are for internal use only.
+	// Developer-facing APIs wrap these methods to provide a more friendly API.
+
+	// Internal use only.
+	Call(service, method string, in, out proto.Message, opts *internal.CallOptions) error
+	// Internal use only. Use AppID instead.
+	FullyQualifiedAppID() string
+	// Internal use only.
+	Request() interface{}
+}
+
+// NewContext returns a context for an in-flight HTTP request.
+// Repeated calls will return the same value.
+func NewContext(req *http.Request) Context {
+	return internal.NewContext(req)
+}
+
+// TODO(dsymonds): Add BackgroundContext function?
+
+// BlobKey is a key for a blobstore blob.
+//
+// Conceptually, this type belongs in the blobstore package, but it lives in
+// the appengine package to avoid a circular dependency: blobstore depends on
+// datastore, and datastore needs to refer to the BlobKey type.
+type BlobKey string
+
+// GeoPoint represents a location as latitude/longitude in degrees.
+type GeoPoint struct {
+	Lat, Lng float64
+}
+
+// Valid returns whether a GeoPoint is within [-90, 90] latitude and [-180, 180] longitude.
+func (g GeoPoint) Valid() bool {
+	return -90 <= g.Lat && g.Lat <= 90 && -180 <= g.Lng && g.Lng <= 180
+}