Add Travis CI badge to readme

Author: carlbennett

README.md

@@ -1,5 +1,6 @@
 # BNCSUtil
-## Summary
+[![Build Status](https://travis-ci.org/BNETDocs/bncsutil.svg?branch=master)](https://travis-ci.org/BNETDocs/bncsutil)
+
 **BNCSUtil** is the **B**attle.**N**et **C**hat **S**ervice **Util**ity which
 aids applications trying to logon to Classic Battle.net™ using the binary
 protocol. Specifically, BNCSUtil has functions that help with the cryptography