Use mod vendor for vendored directory (backwards compatible)

vendor/github.com/go-telegram-bot-api/telegram-bot-api/.gitignore

@@ -0,0 +1,2 @@
+.idea/
+coverage.out

vendor/github.com/go-telegram-bot-api/telegram-bot-api/.travis.yml

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+language: go
+
+go:
+  - 1.4
+  - tip

vendor/github.com/go-telegram-bot-api/telegram-bot-api/README.md

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+# Golang bindings for the Telegram Bot API
+
+[![GoDoc](https://godoc.org/github.com/go-telegram-bot-api/telegram-bot-api?status.svg)](http://godoc.org/github.com/go-telegram-bot-api/telegram-bot-api)
+[![Travis](https://travis-ci.org/go-telegram-bot-api/telegram-bot-api.svg)](https://travis-ci.org/go-telegram-bot-api/telegram-bot-api)
+
+All methods have been added, and all features should be available.
+If you want a feature that hasn't been added yet or something is broken,
+open an issue and I'll see what I can do.
+
+All methods are fairly self explanatory, and reading the godoc page should
+explain everything. If something isn't clear, open an issue or submit
+a pull request.
+
+The scope of this project is just to provide a wrapper around the API
+without any additional features. There are other projects for creating
+something with plugins and command handlers without having to design
+all that yourself.
+
+Use `github.com/go-telegram-bot-api/telegram-bot-api` for the latest
+version, or use `gopkg.in/telegram-bot-api.v4` for the stable build.
+
+Join [the development group](https://telegram.me/go_telegram_bot_api) if
+you want to ask questions or discuss development.
+
+## Example
+
+This is a very simple bot that just displays any gotten updates,
+then replies it to that chat.
+
+```go
+package main
+
+import (
+	"log"
+	"gopkg.in/telegram-bot-api.v4"
+)
+
+func main() {
+	bot, err := tgbotapi.NewBotAPI("MyAwesomeBotToken")
+	if err != nil {
+		log.Panic(err)
+	}
+
+	bot.Debug = true
+
+	log.Printf("Authorized on account %s", bot.Self.UserName)
+
+	u := tgbotapi.NewUpdate(0)
+	u.Timeout = 60
+
+	updates, err := bot.GetUpdatesChan(u)
+
+	for update := range updates {
+		if update.Message == nil {
+			continue
+		}
+
+		log.Printf("[%s] %s", update.Message.From.UserName, update.Message.Text)
+
+		msg := tgbotapi.NewMessage(update.Message.Chat.ID, update.Message.Text)
+		msg.ReplyToMessageID = update.Message.MessageID
+
+		bot.Send(msg)
+	}
+}
+```
+
+If you need to use webhooks (if you wish to run on Google App Engine),
+you may use a slightly different method.
+
+```go
+package main
+
+import (
+	"gopkg.in/telegram-bot-api.v4"
+	"log"
+	"net/http"
+)
+
+func main() {
+	bot, err := tgbotapi.NewBotAPI("MyAwesomeBotToken")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	bot.Debug = true
+
+	log.Printf("Authorized on account %s", bot.Self.UserName)
+
+	_, err = bot.SetWebhook(tgbotapi.NewWebhookWithCert("https://www.google.com:8443/"+bot.Token, "cert.pem"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	info, err := bot.GetWebhookInfo()
+	if err != nil {
+		log.Fatal(err)
+	}
+	if info.LastErrorDate != 0 {
+		log.Printf("[Telegram callback failed]%s", info.LastErrorMessage)
+	}
+	updates := bot.ListenForWebhook("/" + bot.Token)
+	go http.ListenAndServeTLS("0.0.0.0:8443", "cert.pem", "key.pem", nil)
+
+	for update := range updates {
+		log.Printf("%+v\n", update)
+	}
+}
+```
+
+If you need, you may generate a self signed certficate, as this requires
+HTTPS / TLS. The above example tells Telegram that this is your
+certificate and that it should be trusted, even though it is not
+properly signed.
+
+    openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 3560 -subj "//O=Org\CN=Test" -nodes
+
+Now that [Let's Encrypt](https://letsencrypt.org) has entered public beta,
+you may wish to generate your free TLS certificate there.