The LogIn has been refactored with simple_form.
The Task has been refactored with simple_form.
The Comment has been refactored with simple_form.
Merge branch 'feature/refactor_with_simple_forms' into develop

* feature/refactor_with_simple_forms:
  The Comment has been refactored with simple_form.
  The Task has been refactored with simple_form.
  The LogIn has been refactored with simple_form.