remove explicit http image for gravatar images because it makes the whole site not https friendly. It works because gravatar support both http & https

pinry/templates/includes/lightbox.html

@@ -12,7 +12,7 @@
                     </div>
                 {{/if}}
                     <div class="avatar pull-left">
-                        <img src="http://gravatar.com/avatar/{{submitter.gravatar}}.jpg">
+                        <img src="//gravatar.com/avatar/{{submitter.gravatar}}.jpg">
                     </div>
                     <div class="text pull-left">
                         <span class="dim">pinned by</span> {{submitter.username}}

pinry/templates/includes/pins.html

@@ -22,7 +22,7 @@
             {{/if}}
             <div class="pin-footer clearfix">
                 <div class="avatar pull-left">
-                    <img src="http://gravatar.com/avatar/{{submitter.gravatar}}">
+                    <img src="//gravatar.com/avatar/{{submitter.gravatar}}">
                 </div>
                 <div class="text pull-right">
                     <span class="dim">pinned by</span>