Add Author dropdown to PostSettingsMenu

Ref #3084
This PR does NOT hide the dropdown as required to close 3084.

- `EditorNewRoute` creates post with the author set to the current user
- added `authors` ArrayPromiseProxy (whoa, what?) to PSM
- added `changeAuthor` function that sets author and saves model when the user selects a new author

ghost/admin/controllers/post-settings-menu.js

@@ -13,6 +13,33 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
             this.addObserver('titleScratch', this, 'titleObserver');
         }
     },
+    selectedAuthor: Ember.computed.oneWay('author'),
+    changeAuthor: function () {
+        var author = this.get('author'),
+            selectedAuthor = this.get('selectedAuthor'),
+            model = this.get('model'),
+            self = this;
+        //return if nothing changed
+        if (selectedAuthor.get('id') === author.get('id')) {
+            return;
+        }
+        model.set('author', selectedAuthor);
+        model.save(this.get('saveOptions')).catch(function (errors) {
+            self.showErrors(errors);
+            self.set('selectedAuthor', author);
+            model.rollback();
+        });
+    }.observes('selectedAuthor'),
+    authors: function () {
+        //Loaded asynchronously, so must use promise proxies.
+        var deferred = {};
+        deferred.promise = this.store.find('user').then(function (users) {
+            return users.rejectBy('id', 'me');
+        });
+        return Ember.ArrayProxy
+            .extend(Ember.PromiseProxyMixin)
+            .create(deferred);
+    }.property(),
     //Changes in the PSM are too minor to warrant NProgress firing
     saveOptions: {disableNProgress: true},
     /**
@@ -39,7 +66,7 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
     generateSlugPlaceholder: function () {
         var self = this,
             title = this.get('titleScratch');
-        
+
         this.get('slugGenerator').generateSlug(title).then(function (slug) {
             self.set('slugPlaceholder', slug);
         });
@@ -97,7 +124,7 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
         updateSlug: function (newSlug) {
             var slug = this.get('slug'),
                 self = this;
-            
+
             newSlug = newSlug || slug;
 
             newSlug = newSlug.trim();
@@ -210,4 +237,4 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
     }
 });
 
-export default PostSettingsMenuController;
+export default PostSettingsMenuController;

ghost/admin/routes/editor/new.js

@@ -4,7 +4,12 @@ var EditorNewRoute = Ember.Route.extend(Ember.SimpleAuth.AuthenticatedRouteMixin
     classNames: ['editor'],
 
     model: function () {
-        return this.store.createRecord('post');
+        var self = this;
+        return this.get('session.user').then(function (user) {
+            return self.store.createRecord('post', {
+                author: user
+            });
+        });
     },
 
     setupController: function (controller, model) {

ghost/admin/templates/post-settings-menu.hbs

@@ -19,6 +19,21 @@
             </tr>
             <tr class="post-setting">
                 <td class="post-setting-label">
+		    <label for="post-setting-author">Author</label>
+		</td>
+		<td class="post-setting-field">
+		    <span class="author-select-wrapper" {{bind-attr data-select-text=selectedAuthor.name}}>
+		       {{view Ember.Select
+			   name="post-setting-author"
+			   content=authors
+			   optionValuePath="content.id"
+			   optionLabelPath="content.name"
+			   selection=selectedAuthor}}
+		    </span>
+		</td>
+	    </tr>
+	    <tr class="post-setting">
+		<td class="post-setting-label">
                     <label class="label" for="static-page">Static Page</label>
                 </td>
                 <td class="post-setting-item">