Stop using gopkg in README among other minor improvements.

README.md

@@ -3,10 +3,6 @@
 [![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.
@@ -16,14 +12,14 @@ 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
 
+First, ensure the library is installed and up to date by running
+`go get -u github.com/go-telegram-bot-api/telegram-bot-api`.
+
 This is a very simple bot that just displays any gotten updates,
 then replies it to that chat.
 
@@ -32,7 +28,8 @@ package main
 
 import (
 	"log"
-	"gopkg.in/telegram-bot-api.v4"
+
+	"github.com/go-telegram-bot-api/telegram-bot-api"
 )
 
 func main() {
@@ -77,9 +74,10 @@ you may use a slightly different method.
 package main
 
 import (
-	"gopkg.in/telegram-bot-api.v4"
 	"log"
 	"net/http"
+
+	"github.com/go-telegram-bot-api/telegram-bot-api"
 )
 
 func main() {