Added email to username if no name is given

Gets rid of generic "Ghost" - we know a user will always have an email address as it is a required field.

core/server.js

@@ -112,6 +112,7 @@ function ghostLocals(req, res, next) {
             _.extend(res.locals,  {
                 currentUser: {
                     name: currentUser.attributes.name,
+                    email: currentUser.attributes.email,
                     image: currentUser.attributes.image
                 }
             });

core/server/views/partials/navbar.hbs

@@ -10,7 +10,7 @@
             <li id="usermenu" class="subnav">
                 <a href="#" data-toggle="ul" class="dropdown">
                     <img class="avatar" src="{{#if currentUser.image}}{{currentUser.image}}{{else}}/shared/img/user-image.png{{/if}}" alt="Avatar" />
-                    <span class="name">{{#if currentUser.name}}{{currentUser.name}}{{else}}Ghost{{/if}}</span>
+                    <span class="name">{{#if currentUser.name}}{{currentUser.name}}{{else}}{{currentUser.email}}{{/if}}</span>
                 </a>
                 <ul class="overlay">
                     <li class="usermenu-profile"><a href="/ghost/settings/user/">Your Profile</a></li>