Add e2e tests

vendor/github.com/moul/http2curl/README.md

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+# http2curl
+:triangular_ruler: Convert Golang's http.Request to CURL command line
+
+[![Build Status](https://travis-ci.org/moul/http2curl.svg?branch=master)](https://travis-ci.org/moul/http2curl)
+[![GoDoc](https://godoc.org/github.com/moul/http2curl?status.svg)](https://godoc.org/github.com/moul/http2curl)
+[![Coverage Status](https://coveralls.io/repos/moul/http2curl/badge.svg)](https://coveralls.io/github/moul/http2curl)
+
+To do the reverse, check out [mholt/curl-to-go](https://github.com/mholt/curl-to-go).
+
+## Example
+
+```go
+import "http"
+import "github.com/moul/http2curl"
+
+data := bytes.NewBufferString(`{"hello":"world","answer":42}`)
+req, _ := http.NewRequest("PUT", "http://www.example.com/abc/def.ghi?jlk=mno&pqr=stu", data)
+req.Header.Set("Content-Type", "application/json")
+
+command, _ := http2curl.GetCurlCommand(req)
+fmt.Println(command)
+// Output: curl -X PUT -d "{\"hello\":\"world\",\"answer\":42}" -H "Content-Type: application/json" http://www.example.com/abc/def.ghi?jlk=mno&pqr=stu
+```
+
+## Install
+
+```php
+$ go get github.com/moul/http2curl
+```
+
+## Usages
+
+- https://github.com/parnurzeal/gorequest
+- https://github.com/scaleway/scaleway-cli
+- https://github.com/nmonterroso/cowsay-slackapp
+- https://github.com/moul/as-a-service
+- https://github.com/gavv/httpexpect
+- https://github.com/smallnest/goreq
+
+## License
+
+MIT