Buttons for issues / report issue

[Lopez Hugo]

Hi, It could be interesting and cheap to provide a "issues" buttons so visitors may go straight to report an issue. Especially useful for sites in Alpha / Beta.

<iframe src="https://ghbtns.com/github-btn.html?user=twbs&repo=bootstrap&type=issues&count=true&size=large" frameborder="0" scrolling="0" width="160px" height="30px"></iframe>