More tweaks, now defaults to all websites for product creation unless specified, and customizable padding length for the macros
Added support for using AvS_FastSimpleImport Magento extension. This enables 20x+ speedup vs creating each product individually, though it is slower for fewer numbers of / individual products. Also, adding an image (currently just one) for the product when using AvS_FastSimpleImport (not yet implemented without it)