README.md in simple_postmark-0.4.2 vs README.md in simple_postmark-0.4.3

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-# simple_postmark [![Build Status](https://secure.travis-ci.org/haihappen/simple_postmark.png)](http://travis-ci.org/haihappen/simple_postmark)
+# simple_postmark [![Build Status](https://secure.travis-ci.org/haihappen/simple_postmark.png?branch=master)](http://travis-ci.org/haihappen/simple_postmark)
 
 SimplePostmark makes it easy to send mails via [Postmark](http://postmarkapp.com)™ using Rails 3's ActionMailer.
 SimplePostmark is inspired by [postmark-gem](https://github.com/wildbit/postmark-gem), but unfortunately postmark-gem forced to me to use non-standard Rails calls like `postmark_attachments`. SimplePostmark uses the standard Rails 3's ActionMailer syntax to send your emails via Postmark.
 
 Tested against Ruby versions `1.9.2`, `1.9.3`, `ruby-head` and Rails versions `3.0.x`, `3.1.x`, `3.2.x`, `master` (upcoming Rails `4.0.0`).
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