i.icon-gitorious {
  display: inline-block;
  background-position: 0px 0px;
  background-size: contain;
  background-repeat: no-repeat;
}

i.icon-gitorious-small {
  background-image: image-url('gitorious-logo-blue.png');
  width: 13px;
  height: 13px;
}

i.icon-gitorious-big {
  background-image: image-url('gitorious-logo-black.png');
  width: 18px;
  height: 18px;
}