Fixed typos

ghost/admin/app/controllers/posts.js

@@ -79,7 +79,7 @@ var PostsController = Ember.ArrayController.extend(PaginationControllerMixin, {
 
     init: function () {
         // let the PaginationControllerMixin know what type of model we will be paginating
-        // this is necesariy because we do not have access to the model inside the Controller::init method
+        // this is necessary because we do not have access to the model inside the Controller::init method
         this._super({modelType: 'post'});
     }
 });

ghost/admin/app/mixins/validation-engine.js

@@ -82,7 +82,7 @@ var ValidationEngine = Ember.Mixin.create({
     },
 
     /**
-    * Passses the model to the validator specified by validationType.
+    * Passes the model to the validator specified by validationType.
     * Returns a promise that will resolve if validation succeeds, and reject if not.
     * Some options can be specified:
     *

ghost/admin/app/styles/components/splitbuttons.scss

@@ -162,7 +162,7 @@
             };
         }
 
-        // If it has a class of "up" spin it an extra 180degress to point up
+        // If it has a class of "up" spin it an extra 180degrees to point up
         &.up:hover,
         &.up:focus {
             @include icon($i-chevron-down) {

ghost/admin/app/styles/layouts/editor.scss

@@ -454,7 +454,7 @@ body.zen {
     }
 }//#publish-bar
 
-.extended-tags { // When the tag bar is exapanded
+.extended-tags { // When the tag bar is expanded
     position: static;
     min-height: 100%;