Update the db
Refine documentations in index.php
Define a HOST for the website
Add a random_string() function
Models can be update with NULL values
Mails can be sent in HTML format
Add the possibility to render inline Smarty template with render_as_string()
Add confirmation emails in the sign up process
Merge branch 'confirmation-email'

* confirmation-email:
  Add confirmation emails in the sign up process
  Add the possibility to render inline Smarty template with render_as_string()
  Mails can be sent in HTML format
  Models can be update with NULL values
  Add a random_string() function
  Define a HOST for the website
  Refine documentations in index.php
  Update the db