Enable confirmable and reconfirmable modules for User

Now when you want to signup or change existing email you will be forced
to confirm that you really own this email. You get email with link to
follow in order to confirm your email address

Conflicts:
	app/models/user.rb

app/models/user.rb

@@ -43,7 +43,7 @@ require 'file_size_validator'
 
 class User < ActiveRecord::Base
   devise :database_authenticatable, :token_authenticatable, :lockable, :async,
-         :recoverable, :rememberable, :trackable, :validatable, :omniauthable, :registerable
+         :recoverable, :rememberable, :trackable, :validatable, :omniauthable, :confirmable, :registerable
 
   attr_accessible :email, :password, :password_confirmation, :remember_me, :bio, :name, :username,
                   :skype, :linkedin, :twitter, :color_scheme_id, :theme_id, :force_random_password,

config/initializers/devise.rb

@@ -54,6 +54,8 @@ Devise.setup do |config|
   # The realm used in Http Basic Authentication. "Application" by default.
   # config.http_authentication_realm = "Application"
 
+  config.reconfirmable = true
+
   # It will change confirmation, password recovery and other workflows
   # to behave the same regardless if the e-mail provided was right or wrong.
   # Does not affect registerable.

db/migrate/20131009115346_add_confirmable_to_users.rb

+class AddConfirmableToUsers < ActiveRecord::Migration
+  def self.up
+    add_column :users, :confirmation_token, :string
+    add_column :users, :confirmed_at, :datetime
+    add_column :users, :confirmation_sent_at, :datetime
+    add_column :users, :unconfirmed_email, :string
+    add_index :users, :confirmation_token, unique: true
+    User.update_all(confirmed_at: Time.now)
+  end
+
+  def self.down
+    remove_column :users, :confirmation_token, :confirmed_at, :confirmation_sent_at
+    remove_column :users, :unconfirmed_email
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20131005191208) do
+ActiveRecord::Schema.define(:version => 20131009115346) do
 
   create_table "deploy_keys_projects", :force => true do |t|
     t.integer  "deploy_key_id", :null => false
@@ -284,10 +284,15 @@ ActiveRecord::Schema.define(:version => 20131005191208) do
     t.datetime "password_expires_at"
     t.integer  "created_by_id"
     t.string   "avatar"
+    t.string   "confirmation_token"
+    t.datetime "confirmed_at"
+    t.datetime "confirmation_sent_at"
+    t.string   "unconfirmed_email"
   end
 
   add_index "users", ["admin"], :name => "index_users_on_admin"
   add_index "users", ["authentication_token"], :name => "index_users_on_authentication_token", :unique => true
+  add_index "users", ["confirmation_token"], :name => "index_users_on_confirmation_token", :unique => true
   add_index "users", ["email"], :name => "index_users_on_email", :unique => true
   add_index "users", ["extern_uid", "provider"], :name => "index_users_on_extern_uid_and_provider", :unique => true
   add_index "users", ["name"], :name => "index_users_on_name"