Add Facebook login with Sorcery

The facebook key and secret defined in the sorcery config file are for
testing only and need to be changed and not committed to source when
app is ready to go live

test/controllers/oauths_controller_test.rb

@@ -0,0 +1,14 @@
+require 'test_helper'
+
+class OauthsControllerTest < ActionController::TestCase
+  test "should get oauth" do
+    get :oauth
+    assert_response :success
+  end
+
+  test "should get callback" do
+    get :callback
+    assert_response :success
+  end
+
+end

test/factories/authentications.rb

@@ -0,0 +1,6 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :authentication do
+  end
+end

test/helpers/oauths_helper_test.rb

@@ -0,0 +1,4 @@
+require 'test_helper'
+
+class OauthsHelperTest < ActionView::TestCase
+end

test/models/authentication_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class AuthenticationTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end