ruby on rails nifty generators

[aniketshivamtiwari]

my gem file
gem 'rails', '4.2.4'
gem 'mysql2','> 0.3.20'
gem 'sass-rails', '> 5.0'
gem 'devise'
gem "nifty-generators", :group => :development
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '> 4.1.0'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '> 2.0'
gem 'sdoc', '~> 0.4.0', group: :doc

migrations
class DeviseCreateUsers < ActiveRecord::Migration
def change
create_table(:users) do |t|
## Database authenticatable
t.string :email, null: false, default: ""
t.string :encrypted_password, null: false, default: ""

  ## Recoverable
  t.string   :reset_password_token
  t.datetime :reset_password_sent_at

  ## Rememberable
  t.datetime :remember_created_at

  ## Trackable
  t.integer  :sign_in_count, default: 0, null: false
  t.datetime :current_sign_in_at
  t.datetime :last_sign_in_at
  t.string   :current_sign_in_ip
  t.string   :last_sign_in_ip
  t.string :name

t.timestamps null: false
end

add_index :users, :email,                unique: true
add_index :users, :reset_password_token, unique: true
# add_index :users, :confirmation_token,   unique: true
# add_index :users, :unlock_token,         unique: true

end
end
my model
class User < ActiveRecord::Base

Include default devise modules. Others available are:

:confirmable, :lockable, :timeoutable and :omniauthable

devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
validates :email, :presence => true, :uniqueness => true
my routes file
Rails.application.routes.draw do
devise_for :users
root :to => "home#index"
end
my controller
class HomeController < ApplicationController

def index

end
end

my view

hellow to index

end
I am following this tutorial
http://code.tutsplus.com/tutorials/build-a-dropbox-like-file-sharing-site-with-ruby-on-rails--net-17940
but nifty layout is not working..i need to know whether it works with rails 4.2.2 or not if not then what is the solution