Update factory girl to last version

spec/views/tracks/show.html.haml_spec.rb

@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe 'tracks/show' do
-  let(:track) { Factory.create(:track) }
+  let(:track) { FactoryGirl.create(:track) }
 
   before do
     assign :track, track
@@ -13,7 +13,7 @@ describe 'tracks/show' do
   end
 
   context 'when track has a sound' do
-    let(:track) { Factory.create(:track_with_sound) }
+    let(:track) { FactoryGirl.create(:track_with_sound) }
 
     it 'provides an audio stream for the track' do
       render

spec/views/users/new.html.haml_spec.rb

@@ -48,8 +48,8 @@ describe 'users/new' do
 
   context 'when the user has some validation errors' do
     it 'on the email address uniqueness' do
-      user = Factory.create(:user, :email => 'unique@example.net')
-      new_user = Factory.build(:user, :email => user.email)
+      user = FactoryGirl.create(:user, :email => 'unique@example.net')
+      new_user = FactoryGirl.build(:user, :email => user.email)
       new_user.save
       assign :user, new_user
       render