Add base plugin system for shipping services
Issue #2654786 by googletorp, mcdruid: Wildcard flushes to cache_commerce_shipping_rates can cause db deadlocks
Issue #2410911 by mglaman, wgsimon, akosipax, googletorp: Notice: Undefined index: addressfield in commerce_shipping_recalculate_services_submit()
Initial commit of 8.x-2.x branch
Issue #2026321 by andyg5000, mglaman, joelpittet: Avoid overwriting an already updated order
Issue #2309359 by pnigro, jkopel, googletorp: Cannot retrieve UPS and USPS shipping rates in back end
Issue #2452835 by bgilhome: Access $form_state in shipping options hook (hook_commerce_shipping_service_rate_options_alter)
Issue #2452859 by bgilhome, googletorp: commerceCheckShippingRecalculation compatibility with Chosen
Improve JS a bit, removing redundant code.
Issue #2344739 by GoZ, joelpittet, googletorp: Allow HTML on service name and rate in pane review
Issue #2463921 by joelpittet, googletorp: Numeric Machine Names break menu titles for commerce_shipping_ui
Issue #2275495 by nostop8: Fixed EntityMetadataWrapperException: Unable to get the data property type.
Issue #2026321 by tatyana, andyg5000, plach: Fixed Avoid overwriting an already updated order.
Issue #2077153 by niko- | aa2007: Realization AJAX with shipping_service's callback details_form.
Issue #2217607 follow-up by rszrama: use the proper table alias in the join's subquery.
Add a relationsip from the order table to a representative line item.
Issue #1952640 by Anthony Goode, googletorp: Machine name label of Admin config shipping interface not translatable
Issue #2026321 by plach: Avoid overwriting an already updated order
Issue #1992734 by barraponto, Byfred: Customized display_title for shipping services
Issue #2010738 by _theo: Add shipping service description to shipping selection form
Issue #2018157 by rszrama: ensure commerce_shipping_line_item_title() can't return an array of shipping service titles if a line item's shipping service field isn't set for some reason.
Don't hard-code currency in example module.
Issue #1843402 by Fonant, makangus: ensure the update process from Shipping 1.x won't fail if a line item somehow references a deleted order.
Clean up white space.
Fix options callback for shipping service field.
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