Added GoRequest

I would like to add my GoRequest lib to the list.

GoRequest(https://github.com/parnurzeal/gorequest) is a simplified http client for Go. 
It is inspired by SuperAgent in Node.js to leverage the easy-to-use interface.

It is also well documented. (http://godoc.org/github.com/parnurzeal/gorequest)

Please check it out! Thank you!