Updated badge URLs

[ci skip]

README.md

@@ -2,10 +2,12 @@ Mink BrowserKit Driver
 ======================
 
 [![Latest Stable Version](https://poser.pugx.org/behat/mink-browserkit-driver/v/stable.png)](https://packagist.org/packages/behat/mink-browserkit-driver)
+[![Latest Unstable Version](https://poser.pugx.org/behat/mink-browserkit-driver/v/unstable.svg)](https://packagist.org/packages/behat/mink-browserkit-driver)
 [![Total Downloads](https://poser.pugx.org/behat/mink-browserkit-driver/downloads.png)](https://packagist.org/packages/behat/mink-browserkit-driver)
-[![Build Status](https://travis-ci.org/Behat/MinkBrowserKitDriver.png?branch=master)](http://travis-ci.org/Behat/MinkBrowserKitDriver)
+[![Build Status](https://travis-ci.org/Behat/MinkBrowserKitDriver.svg?branch=master)](https://travis-ci.org/Behat/MinkBrowserKitDriver)
 [![Scrutinizer Quality Score](https://scrutinizer-ci.com/g/Behat/MinkBrowserKitDriver/badges/quality-score.png?s=0443d284940e099ea560eb39b6b2fcdc5d4e7f29)](https://scrutinizer-ci.com/g/Behat/MinkBrowserKitDriver/)
 [![Code Coverage](https://scrutinizer-ci.com/g/Behat/MinkBrowserKitDriver/badges/coverage.png?s=48960c4495488ab0b7d310b62322f017497f5bfa)](https://scrutinizer-ci.com/g/Behat/MinkBrowserKitDriver/)
+[![License](https://poser.pugx.org/behat/mink-browserkit-driver/license.svg)](https://packagist.org/packages/behat/mink-browserkit-driver)
 
 Usage Example
 -------------
@@ -41,7 +43,7 @@ Installation
 ```
 
 ``` bash
-$> curl http://getcomposer.org/installer | php
+$> curl -sS https://getcomposer.org/installer | php
 $> php composer.phar install
 ```