Admin notes advanced

Features/advantages:

- Create, edit and delete admin notes.

- Easy installation (no need to edit files and no existing database tables are changed).

- Active Notes: the Zen Cart notifier system is being used to notify you about active notes.

- Attached Special notes: attach notes to a customer, product, order or category. These special notes will only show a notification while viewing the customer, product, order or category.

- Unattached customer, product, order or category notes: these notes are specific, and will show a link to the customer, product, order or category, but you will always be notified (whether you are viewing the customer, product, order or category or not).

- Notes categories: create notes categories, and filter notes by category.

- Notes search (name and text)

(tested on Zen-Cart 1.3.6 - 1.3.8, probably works on all 1.3.x versions)

Discussion:
http://www.zen-cart.com/forum/showthread.php?p=609723