Adds DockerCon 2017 logo

_layouts/docs.html

@@ -109,7 +109,7 @@ ng\:form {
       <div class="top-right-bg"></div>
       <div class="container">
         <div class="row">
-          <div class="col-xs-2"> <a href="/"><img class="logo" src="/images/logo-docker-main.png"></a> </div>
+          <div class="col-xs-2"> <a href="https://dockercon.smarteventscloud.com/portal/newreg.ww"><img class="logo" src="/images/dockercon-17.png"></a> </div>
           <div class="col-xs-10">
             <ul class="nav-global">
               <li class="first leaf menu-mlid-603"><a href="/" target="_blank">Docs</a></li>

css/documentation.css

@@ -1,6 +1,12 @@
 /* FIXUP allcss.css */
 /* @media screen and (max-width: 1199px) */
 
+.logo {
+  margin-top: 1px !important;
+  width: auto !important;
+  height: auto !important;
+  max-width: none !important;
+}
 .autocompleteSelected {
   background-color: #f5f5f5;
 }