Improved add tasks view. Added category page for listing tasks. Didn't add new urls to menu so you need to check urls.py for new pages.
Add Task: Added exceptions handling and redirection to index  when successfull
Add Task form: updated with sensible priorities, added DateInput field which checks for correct date format
Implemented functionality to edit project.
Deleted unnecessary changes to model.py
Created profile view.
Added colours to tasks depending on priority. Added temperory list of all existing projects in index page. Added datepicker for add task form.
Removed duplicated imports