Improve search result text

Remove alt text from images which causes search result description to display unhelpful information before the library's description.

"Release License Build Status Downloads. PHP Curl class makes it easy to ..."

Author: zachborboa

README.md

@@ -1,9 +1,9 @@
 # PHP Curl Class: HTTP requests made easy
 
-[![Release](https://img.shields.io/github/release/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
-[![License](https://img.shields.io/github/license/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/blob/master/LICENSE)
-[![Build Status](https://img.shields.io/travis/php-curl-class/php-curl-class.svg)](https://travis-ci.org/php-curl-class/php-curl-class/)
-[![Downloads](https://img.shields.io/packagist/dt/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
+[![](https://img.shields.io/github/release/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
+[![](https://img.shields.io/github/license/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/blob/master/LICENSE)
+[![](https://img.shields.io/travis/php-curl-class/php-curl-class.svg)](https://travis-ci.org/php-curl-class/php-curl-class/)
+[![](https://img.shields.io/packagist/dt/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
 
 PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs.