fixed broken case in readme

README.md

@@ -1,4 +1,4 @@
-# pathrouter [![Build Status](https://travis-ci.org/naleek/pathrouter.svg?branch=master)](https://travis-ci.org/naleek/PathRouter) [![Coverage Status](https://coveralls.io/repos/github/naleek/pathrouter/badge.svg?branch=master)](https://coveralls.io/github/naleek/pathrouter?branch=master) [![GoDoc](https://godoc.org/github.com/naleek/PathRouter?status.svg)](http://godoc.org/github.com/naleek/pathrouter)
+# pathrouter [![Build Status](https://travis-ci.org/naleek/pathrouter.svg?branch=master)](https://travis-ci.org/naleek/pathrouter) [![Coverage Status](https://coveralls.io/repos/github/naleek/pathrouter/badge.svg?branch=master)](https://coveralls.io/github/naleek/pathrouter?branch=master) [![GoDoc](https://godoc.org/github.com/naleek/PathRouter?status.svg)](http://godoc.org/github.com/naleek/pathrouter)
 
 pathrouter is a lightweight high performance path router (also called *multiplexer* or just *mux* for short) for [Go](https://golang.org/).