anchor.diff:  
   ## Password recovery [POST/recover_password]
   
  -This resource is in head of password recovery.
  +Allows user to request new password in case it was forgotten.
   
   + Request (application/json)
   
  
positive.code: ## Register new user [POST/signup]
  
  Registers a new user. Asks for e-mail verification.
  
  Attributes used:
  
  email    - The e-mail address provided by user.
  username - Unique user identifier provided by user. 
  password - The password used to authenticate the user.
  
  The 409 response is returned if a user with a given e-mail address or username already exists.
  
  
negative.code: 
  ## Username recovery [POST/recover_username]
  
  Allows user to be reminded of his/her username via e-mail message.
  
  + Request (application/json)
  
  