Fixed all the following issues:
- incorrect paths (all product images been missing);
- corrected the tep_image_button function for the system buttons (simply created new

tep_sup_image_button function with correct path);
- removed "Add new image" function as it's undeveloped;
- missing calendar (to setup when the product will be available);
- fixed issue with sessions;
- added the logout function;

Based on 29 Jul 2007 module.

Complete module & 100% function and tested!

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