Removed re-direction for unauthorized sessions.
Properly integrated cookie authentication.
General authentication cleanup.
Removed authentication checks from data interface.
Removed authentication checks from categories.
Removed authentication checks from tasks.
Removed all JSON 'authenticated' from tasks.
Removed JSON 'authenticated' from categories.
Removed all authentication checks from items.
Fixed password authentication boolean set.
Fixed password validation.
Moved session start to authentication helpers.
Added authorization check after password.
Added 'session_start' to all app pages.
Re-factored functions and added logout helper.
Added link for logout page.
Added logout functionality.
Updated cookie queries and checks.