I just added the first new libraries.

For each relevant concept, we will have the following files:

pageactionxxx.php
    the file where the actions for xxx are performed, returning to some specified page afterwards
lib/actions/xxx.php
    Action functions: the functions that modify the database.
lib/editforms/xxx.php
    Edit functions: functions to create forms that allow one to modify the database.
lib/displays/xxx.php
    Display functions: the functions that display elements from the database.
lib/functions/xxx.php
    Other functions, that don't belong in actions, editforms or displays.

Please see the files for attachments to see a bit of how this works...
