show loading indicator on show-more button click

assets/scripts/app/controllers/builds.coffee

@@ -7,6 +7,7 @@ Travis.BuildsController = Em.ArrayController.extend
   repoBinding: 'controllers.repo.repo'
   tabBinding: 'controllers.repo.tab'
   isLoadedBinding: 'content.isLoaded'
+  isLoadingBinding: 'content.isLoading'
 
   showMore: ->
     id     = @get('repo.id')

assets/scripts/app/templates/builds/list.hbs

@@ -62,6 +62,9 @@
   {{#if displayShowMoreButton}}
     <p>
       {{view view.ShowMoreButton}}
+      {{#if isLoading}}
+        <span class="loading"></span>
+      {{/if}}
     </p>
   {{/if}}
 {{else}}

assets/scripts/app/views/build.coffee

@@ -11,7 +11,7 @@ Travis.reopen
       tagName: 'button'
       classNameBindings: ['isLoading']
       attributeBindings: ['disabled']
-      isLoadingBinding: 'controller.builds.isLoading'
+      isLoadingBinding: 'controller.isLoading'
       template: Em.Handlebars.compile('{{view.label}}')
 
       disabledBinding: 'isLoading'