-System ask for login and password to acces.

-There are supervisors, who control each management of program.

-In the main page you can see a list of tasks clasified by:
      Tasks assigned to user acceding the page
      Tasks created by that user
      Rest of tasks in case that user is supervisor
      
-Users management:
 Only supervisors can accede to this page.
 There is a list of system users whith the following data:
      Login
      Password
      Name
      Surname
      E-mail
      Supervisor
 Supervisor can modify this data and create new users.  Its requested, at
 least, login, name suername and e-mail. 

-Tasks management:
 This page is accesible from the main page and shows de information related
 the selected task:
      Name
      Description
      Task creator
      Priority
      State
  Also a list of subtasks appears with the following information:
      Name of user
      Assigned subtask
      State of subtask
 This data  is modificable by the task creator or by any supervisor, who can
 add users/subtasks to the main task.
 Every user can modify as well the data of his assigned subtask.
- Multi-language
 Changed the file config.rc you can have distint language
 Spanish or English

