Release v0.4.0

Copied over the release script from skaffold to get all new PRs that
have been merged for the CHANGELOG.

Ran dep ensure.

vendor/github.com/google/go-github/github/users_administration.go

@@ -0,0 +1,67 @@
+// Copyright 2014 The go-github 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 github
+
+import (
+	"context"
+	"fmt"
+)
+
+// PromoteSiteAdmin promotes a user to a site administrator of a GitHub Enterprise instance.
+//
+// GitHub API docs: https://developer.github.com/v3/users/administration/#promote-an-ordinary-user-to-a-site-administrator
+func (s *UsersService) PromoteSiteAdmin(ctx context.Context, user string) (*Response, error) {
+	u := fmt.Sprintf("users/%v/site_admin", user)
+
+	req, err := s.client.NewRequest("PUT", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}
+
+// DemoteSiteAdmin demotes a user from site administrator of a GitHub Enterprise instance.
+//
+// GitHub API docs: https://developer.github.com/v3/users/administration/#demote-a-site-administrator-to-an-ordinary-user
+func (s *UsersService) DemoteSiteAdmin(ctx context.Context, user string) (*Response, error) {
+	u := fmt.Sprintf("users/%v/site_admin", user)
+
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}
+
+// Suspend a user on a GitHub Enterprise instance.
+//
+// GitHub API docs: https://developer.github.com/v3/users/administration/#suspend-a-user
+func (s *UsersService) Suspend(ctx context.Context, user string) (*Response, error) {
+	u := fmt.Sprintf("users/%v/suspended", user)
+
+	req, err := s.client.NewRequest("PUT", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}
+
+// Unsuspend a user on a GitHub Enterprise instance.
+//
+// GitHub API docs: https://developer.github.com/v3/users/administration/#unsuspend-a-user
+func (s *UsersService) Unsuspend(ctx context.Context, user string) (*Response, error) {
+	u := fmt.Sprintf("users/%v/suspended", user)
+
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}