Update images to site's actual badge instead of Symfony numbers
Remove disclaimer about alpha version as @liuggio pointed
Remove examples from README.md

The examples are available on service website, https://poser.pugx.org/, as pointed by @liuggio at https://github.com/PUGX/badge-poser/pull/62#issuecomment-19250597
Merge pull request #62 from rogeriopradoj/patch-1

Update images to site's actual badge instead of Symfony numbers