Fix some validation issues
Delete unnecessary files
Move password salt into private files

Track last login when using permanent login cookies.
Add standalone login form

This form will be used if the user isn’t logged in so he can do it
right here. He will be redirected to the requested page.

Customise regarding redirect headers to reflect this feature.

Also change mail templates to get use of direct login if needed and no
use to click to reach the regarding items.
Style changes
Include new login form
Validation fixes
Enhance mailing system

Check when the user reads some items. Then check if there is a mail
regarding this item queued in the mailing system. When needed, delete
the user’s entry from the recipients list in order to avoid unnecessary
notifications.

Improve mailing sign outs if items are deleted.
Reflect changes for profile avatar editor