Move example code to README (#5)

The code exampleServer.go was added so that dep can correctly identify this repo as a Go repo. However, the file is not really used and the example code is better put into the README as a reference.

This is replaced with a file named dep.go and a comment explaining the purpose of the file.

README.md

@@ -9,4 +9,23 @@ Cryptographically random strings to be used for things like session IDs.
 ## Server
 Starts a HTTP server with graceful shutdown when receiving `SIGINT` or `SIGTERM`
 
+Example code:
+```
+import (
+	"log"
+	"time"
+
+	"github.com/moexmen/gokit/web"
+)
+
+func main() {
+	s := web.Server{
+		Addr:    ":8080",
+		Timeout: 5 * time.Second,
+	}
+	log.Println("Starting...")
+	log.Println(s.ListenAndServe())
+}
+```
+
 [Docker Stop](https://docs.docker.com/compose/reference/stop/) has a default timeout of 10 seconds. We recommend to use a timeout lower than 10 seconds if you use Docker.

dep.go

@@ -0,0 +1,2 @@
+// This file is used to ensure that dep correctly identifies this as a Go repository.
+package main