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Add compatibility to 'Strict standards' in php 5.4.16
Remove extraneous $wpdb globalization

There were a handful of functions containing legacy $wpdb globals.  These can be safely removed.
Google Analytics, Add to cart event uniformity for shop and single.
add woocommerce_get_variation_price_html filter
Settings refactoring
Merge branch 'master' of git://github.com/woothemes/woocommerce
add action woocommerce_variable_product_sync to variable sync
Merge pull request #3537 from helgatheviking/new-action/woocommerce_variable_product_sync

New action/woocommerce variable product sync
Merge pull request #3533 from kloon/master

Google Analytics, Add to cart event uniformity for shop and single.
Merge pull request #3532 from JustinSainton/silly-wpdb

Remove extraneous $wpdb globalization
Hungarian translation updates
reverted Hungarian translation
Ensure sku placeholder exists for variable products Closes #1734.
Check attribute values are posted.
Only empty the cart for logged in users.
Correct string to times and ranges. Closes #3540
Customer invoice does not need toggle. Closes #3459.
Pass item + id to order_line_item hook Closes #3518.
Bulk edit mark on hold Closes #3496.