make search work without nickname usage

app/controllers/users_controller.rb

@@ -2,7 +2,7 @@ class UsersController < ApplicationController
 
   # Currently used to display users nick and ids for autocomplete
   def index
-    @users = User.where("nick LIKE ?", "%#{params[:q]}%")
+    @users = User.natural_search(params[:q])
     respond_to do |format|
       format.json { render :json => @users.map { |u| u.token_attributes } }
     end