Many bug fixes and improvements.

= 1.7 on 2013-08-19 =
* Improved: Now uses a script that allows searching of products and
categories to insert
* Improved: Now you can watch the generation of the product and
category list while it's processing. No more guessing whether it's
working or not.
* Fixed: Product links are now properly fetched from the `custom_url`
parameter.
* Fixed: Cache would always need to be rebuilt
* Fixed: Only 50 categories were retrieved
* Fixed: Child categories were not properly displayed