Changes for ember-data revision 12

Sideload changed a way of loading records associated with the main
record. Now, to make it simple, sideloaded records must be always in
plural form.

assets/scripts/app/models/build.coffee

@@ -16,7 +16,6 @@ require 'travis/model'
 
   repo:   DS.belongsTo('Travis.Repo')
   commit: DS.belongsTo('Travis.Commit')
-  commits: DS.belongsTo('Travis.Commit')
   jobs:   DS.hasMany('Travis.Job')
 
   config: (->

assets/scripts/app/models/job.coffee

@@ -17,7 +17,6 @@ require 'travis/model'
   repo:   DS.belongsTo('Travis.Repo')
   build:  DS.belongsTo('Travis.Build')
   commit: DS.belongsTo('Travis.Commit')
-  commits: DS.belongsTo('Travis.Commit')
 
   # this is a fake relationship just to get rid
   # of ember data's bug: https://github.com/emberjs/data/issues/758

assets/scripts/app/store.coffee

@@ -3,7 +3,7 @@ require 'store/rest_adapter'
 coerceId = (id) -> if id == null then null else id+''
 
 Travis.Store = DS.Store.extend
-  revision: 11
+  revision: 12
   adapter: Travis.RestAdapter.create()
 
   init: ->

assets/scripts/app/store/rest_adapter.coffee

@@ -102,6 +102,13 @@ Travis.RestAdapter = DS.RESTAdapter.extend
   merge: (store, record, serialized) ->
     @get('serializer').merge(record, serialized)
 
+  didFindRecord: (store, type, payload, id) ->
+    if (type == Travis.Build || type == Travis.Job) && payload.commit?
+      payload.commits = payload.commit
+      delete payload.commit
+
+    @_super.apply this, arguments
+
   didSaveRecord: (store, type, record, payload) ->
     # API sometimes return { result: true } response
     # which does not play nice with ember-data. For now