Add screenshots to the readme

Author: K-Phoen

README.md

@@ -4,6 +4,10 @@ VCRBundle
 Integrates [php-vcr](https://github.com/php-vcr/php-vcr) into Symfony and its
 web profiler.
 
+<img src="https://cloud.githubusercontent.com/assets/66958/5232274/b841676e-774b-11e4-8f4e-1f3e8cb7739e.png" width="280" height="175" alt="PHP-VCR Symfony web profiler panel"/>
+<img src="https://cloud.githubusercontent.com/assets/66958/5232275/b84288d8-774b-11e4-803c-7b72f75e59b0.png" width="280" height="175" alt="PHP-VCR Symfony web profiler panel - request details"/>
+<img src="https://cloud.githubusercontent.com/assets/66958/5232276/b84411b2-774b-11e4-93a9-475a0eeede65.png" width="280" height="175" alt="PHP-VCR Symfony web profiler panel - response details"/>
+
 ## Installation
 
 Install the behavior adding `php-vcr/vcr-bundle` to your composer.json or