Update location was stomping meta values, don't need to look at the $_POST values as the meta values have already been set.
Merge pull request #1182 from JeffPyeBrook/pr-update-location-stomping-meta

Update location was stomping meta values
add meta attributes to zip edit in shipping calculator, let's meta update automatically
Merge pull request #1184 from JeffPyeBrook/pr-fix-zip-edit-in-shipping-calc

Fix meta attributes on zip edit in shipping calculator
Remove unused  parameter from wpsc_user_log_deprecated_filter_values()
Modify logic on how taxes and coupons contribute to the total price. There is future iterative work to be done here, and some opportunity for more refined settings in coupons, however, the binary assumptions from those inferred settings were inverted.  We were essentially presuming coupons should always apply, unconditionally, to taxes and shipping.  That assumption led to some odd behavior, including negative taxes.  These changes fix #170
Merge branch 'master' of github.com:wp-e-commerce/WP-e-Commerce
Merge remote-tracking branch 'upstream/master'