Update code for newest ember-model

assets/scripts/app/app.coffee

@@ -126,7 +126,7 @@ unless window.TravisApplication
       if reference && options.skipIfExists
         return
 
-      reference = type._referenceForId(hash.id)
+      reference = type._getOrCreateReferenceForId(hash.id)
       if reference.record
         reference.record.merge(hash)
       else

assets/scripts/app/controllers/flash.coffee

@@ -9,7 +9,7 @@ Travis.FlashController = Ember.ArrayController.extend
     @set('flashes', Ember.A())
 
   content: (->
-    @get('unseenBroadcasts').concat(@get('flashes'))
+    @get('unseenBroadcasts').concat(@get('flashes')).filter (o) -> !!o
   ).property('unseenBroadcasts.length', 'flashes.length')
 
   unseenBroadcasts: (->

assets/scripts/lib/travis/model.coffee

@@ -86,10 +86,10 @@ Array.prototype.diff = (a) ->
       @loadTheRest(key)
 
   isAttribute: (name) ->
-    this.attributes.contains(name)
+    this.constructor.getAttributes().contains(name)
 
   isRelationship: (name) ->
-    this.relationships.contains(name)
+    this.constructor.getRelationships().contains(name)
 
   loadTheRest: (key) ->
     # for some weird reason key comes changed to a string and for some weird reason it even is called with
@@ -145,7 +145,7 @@ Array.prototype.diff = (a) ->
   ).property()
 
   isRecordLoaded: (id) ->
-    !!@_referenceForId(id).record
+    !!@_getOrCreateReferenceForId(id).record
 
   camelizeKeys: true