Added missing css background color.

css/zocial.css

@@ -396,6 +396,7 @@ a.zocial {
 .zocial.dropbox {background-color: #fff; color: #312c2a;}
 .zocial.drupal {background-color: #0077c0; color: #fff;}
 .zocial.dwolla {background-color: #e88c02;}
+.zocial.joinme {background-color: #FF8E00;}
 .zocial.email {background-color: #f0f0eb; color: #312c2a;}
 .zocial.eventasaurus {background-color: #192931; color: #fff;}
 .zocial.eventbrite {background-color: #ff5616;}