Delete dimension entries from shopp_meta on product deletion

In table shopp_meta, dimensions are stored with a relation to table shopp_price on shopp_meta.parent = shopp_price.id. 

Right now these entries in meta are left behind after deleting a product. Because of the mentioned relation the removal of the entries needs to be done before removal of shopp_price entries.
Typo in code
Fixed connection detection to not require WP 3.9
Fixed #2897 Normalized directory separators for URL mapping
Fix for #2900

The original if statement would add the scrollable area incorrectly.
Fixed #2900 Added agreement option to defaults and cleaned up code to standards
Fixed #2894 Corrected entity conversion for plain text customer registration emails
Fixed #2888 Calculate total items sold (quantity) through sub-query

The table join for purchased line items caused cartesian product of order rows and purchased line item rows. For every line-item result, the order result columns would be duplicated and then factored into the aggregation functions of the query.
Fixed #2885 Unapply free shipping discounts properly
Fixed an issue where a removed item tied to a discount can cause a fatal error
Fixed #2536

Exclude products in one or more specified collections from storefront, by collection-id.
shopp('storefront.catalog-products','exclude=3,8,12');

Products that have multiple collections attached, will still show if one of the attached collections is not in specified in 'exclude'-option.
Products in 'Uncategorized' will not show.
Fixed working purchase context during order success handler
Fixed item discount handling when an item is removed
Fixed #2909 Correctly set the current shopping customer from the session and evaluate tax rules
#2909 Fixed a fatal caused by misspelled function name
Added 'rel' attributes to funnel page authority to paginated pages
Spelling and punctuation fixes
Merge pull request #2883 from Just-m/1.3.x

Delete dimension entries from shopp_meta on product deletion, add category exclude options to smart collections
1.3.3 release
Fixed #2912 Changed the element reference