Merge theme engine v2
Checkout page user interface issues
* Fix issue where shipping state does not change when shipping calculator drop down changes
Put current customer meta values into hidden fields on checkout page just in case store owner hides fields on checkout forms.  This allows any JavaScript actions that have depend on the availability of specific meta items to work properly if the store administrator hides any of the fields in the checkout forms.
* Shipping state/region elements visibility was being changed when billing country was being changed.  Change billing state/region visibility when shipping country changes instead.

Should resolve issues reported in #1144
force ajaxurl to be set in admin scripts
Fix broken tabs.  props @pippin
Merge branch 'master' of github.com:wp-e-commerce/WP-e-Commerce
Rework some UI on product admin

* Ensure that live previews always show in headings.  Removes wonky absolute positioning as well.
* Fixes bug where stock is sanitized as a digit, but formatted as a string.  1000+ was failing.
* Moves inline JS to admin.js
Merge pull request #1166 from JeffPyeBrook/pr-ajaxurl-not-defined

force ajaxurl to be set in admin scripts
Remove unused  variable from wpsc_product_download_forms() metabox
Merge branch 'master' of github.com:wp-e-commerce/WP-e-Commerce
Restore text type to shipping inputs, so they are properly sized.
Properly decrement metadata in live preview.
Add notice in meta area when no meta exists.
Adjusted upgrade page links and products

Adjusted links and products. Removed unavailable ones and changed links
Add constant to control deprecated js loading
* constant is off by default

*Also...*
* Wrapped WPeC version constants in if blocks.  This will let developers put something into their wp-config.php file that bumps version numbers automatically to force script reloads, or perhaps for other reasons  My preferred insert is appending the time stamp of the wp-e-commerce.js file to the version stamp.
Merge pull request #1168 from misulicus/patch-18

Adjusted upgrade page links and products
Merge pull request #1170 from JeffPyeBrook/pr-issue-1125-deprecated-js-load

Add constant to control deprecated js loading
Only return once in WPSC_Product::_get()
Merge branch 'master' of github.com:wp-e-commerce/WP-e-Commerce
Have Quantity field default to being shown, rather than hidden, by default on new installs.
Better, though not yet perfected, i18n for live previews.  Also, resolves some NaN errors with live previews attempting to show shipping dimensions when variations are enabled.