Feature request: Replace icon-github with github avatar

[JanrikV]

In repo.htm.

<i class="icon icon-github"></i>

Github icon can be replaced by avatar_url.

<a href="{{ repo.owner.html_url }}"> <img src="{{repo.owner.avatar_url}}" class="github_avatar" /> </a>

Github avatar style class:

.github_avatar { border-radius: 50%; width: 32px; }