Merge pull request #26 from bladeofsteel/patch-1

Update README.md

Author: weierophinney

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://secure.travis-ci.org/zendframework/zend-problem-details.svg?branch=master)](https://secure.travis-ci.org/zendframework/zend-problem-details)
 [![Coverage Status](https://coveralls.io/repos/github/zendframework/zend-problem-details/badge.svg?branch=master)](https://coveralls.io/github/zendframework/zend-problem-details?branch=master)
 
-This library provides provides a factory for generating Problem Details
+This library provides a factory for generating Problem Details
 responses, error handling middleware for automatically generating Problem
 Details responses from errors and exceptions, and custom exception types for
 [PSR-7](http://www.php-fig.org/psr/psr-7/) applications.