Fixed #332 Allow users to reset their password (#335)

* <Added password reset system>

* <Added rspec tests>

* <Fixed code style>

* <Added rescue for invalid smtp configuration>

config/routes.rb

@@ -31,6 +31,9 @@ Rails.application.routes.draw do
   # Redirect to terms page
   match '/terms', to: 'users#terms', via: [:get, :post]
 
+  # Password reset resources.
+  resources :password_resets, only: [:new, :create, :edit, :update]
+
   # User resources.
   scope '/u' do
     # Verification Routes