Rename Whisper.View#attributes

Avoid colliding with Backbone.View attributes, which is a list of attrs
to set on the html element for a view.

js/views/new_conversation_view.js

@@ -46,7 +46,7 @@
             this.$el.trigger('remove', {modelId: this.model.id});
             this.remove();
         },
-        attributes: function() {
+        render_attributes: function() {
             return { name: this.model.getTitle() };
         }
     });