Add support for type='number' input in settings form
Make presentation setting page's sections and form, as well as default settings array filterable.
Allow users to select which default styles to include via Settings->Presentation.
Fix pagination issue when pagination for WPEC is disabled.
Allow third party developers to add / remove paths where assets, template parts and view wrappers are searched
Avoid fatal error in case WPSC_Product is merged into core before the theme engine is