Added build status to README

Author: aharshac

README.md

@@ -1,4 +1,8 @@
-# EasyNTPClient
+# EasyNTPClient 
+
+[![Collaborizm](https://img.shields.io/badge/Collaborizm-Join%20now-blue.svg)](https://www.collaborizm.com/)
+[![Build Status](https://travis-ci.org/aharshac/EasyNTPClient.svg?branch=master)](https://travis-ci.org/aharshac/EasyNTPClient)    
+
 Arduino library to read time from Network Time Protocol (NTP) servers.