3.0.12のファイルに対して、修正が行われているファイルは次の通りです。
（vendorフォルダ以外）

★は新規追加

********** 直下ファイル **********

■composer.json
■composer.lock
■eccube_install.sh

********** app **********

■app/console

********** html **********

■html/template/admin/assets/css/bootstrap-datetimepicker.css
■html/template/admin/assets/css/bootstrap-datetimepicker.min.css

■html/template/admin/assets/js/vendor/bootstrap-datetimepicker.js
■html/template/admin/assets/js/vendor/bootstrap-datetimepicker.min.js

■html/template/default/css/slick.css

■html/template/default/img/common/svg.html
■html/template/default/img/common/svg_list.html

********** src/Eccube/ **********

■src/Eccube/Application.php

********** src/Eccube/Command/ **********

■src/Eccube/Command/PluginCommand（フォルダ）★
■src/Eccube/Command/ConfigCommand.php★
■src/Eccube/Command/CacheClearCommand.php
■src/Eccube/Command/PluginCommand.php
■src/Eccube/Command/RouterCommand.php

********** src/Eccube/Common/ **********

■src/Eccube/Common/Constant.php

********** src/Eccube/Controller/ **********

■src/Eccube/Controller/ContactController.php
■src/Eccube/Controller/ForgotController.php

■src/Eccube/Controller/Admin/Content/BlockController.php
■src/Eccube/Controller/Admin/Content/PageController.php

■src/Eccube/Controller/Admin/Order/EditController.php
■src/Eccube/Controller/Admin/Order/OrderController.php

■src/Eccube/Controller/Admin/Product/CsvImportController.php
■src/Eccube/Controller/Admin/Product/ProductClassController.php
■src/Eccube/Controller/Admin/Product/ProductController.php

■src/Eccube/Controller/Admin/Store/PluginController.php

■src/Eccube/Controller/Install/InstallController.php

********** src/Eccube/ControllerProvider/ **********

■src/Eccube/ControllerProvider/AdminControllerProvider.php

********** src/Eccube/Doctrine/ **********

■src/Eccube/Doctrine/ORM/Query/Normalize.php★
■src/Eccube/Doctrine/ORM/Tools（フォルダ）★

********** src/Eccube/Entity/ **********

■src/Eccube/Entity/TaxRule.php

********** src/Eccube/EventListener/ **********

■src/Eccube/EventListener/PaginatorListener.php★

********** src/Eccube/Type/ **********

■src/Eccube/Form/Type/SearchProductType.php

■src/Eccube/Form/Type/Admin/MasterdataEditType.php
■src/Eccube/Form/Type/Admin/OrderDetailType.php
■src/Eccube/Form/Type/Admin/OrderType.php
■src/Eccube/Form/Type/Admin/ProductType.php
■src/Eccube/Form/Type/Admin/SearchOrderType.php
■src/Eccube/Form/Type/Admin/ShipmentItemType.php

■src/Eccube/Form/Type/Install/Step4Type.php

********** src/Eccube/Repository/ **********

■src/Eccube/Repository/OrderRepository.php
■src/Eccube/Repository/ProductRepository.php
■src/Eccube/Repository/TaxRuleRepository.php

********** src/Eccube/Resource/ **********

■src/Eccube/Resource/config/config.yml.dist
■src/Eccube/Resource/config/constant.yml.dist

———————————————

■src/Eccube/Resource/doctrine/migration/Version20161108095350.php★
■src/Eccube/Resource/doctrine/migration/Version20161219135621.php★
■src/Eccube/Resource/doctrine/migration/Version20161219143135.php★

———————————————

■src/Eccube/Resource/template/admin/change_password.twig
■src/Eccube/Resource/template/admin/index.twig
■src/Eccube/Resource/template/admin/pager.twig

■src/Eccube/Resource/template/admin/Content/block_edit.twig
■src/Eccube/Resource/template/admin/Content/layout.twig
■src/Eccube/Resource/template/admin/Content/news.twig
■src/Eccube/Resource/template/admin/Content/news_edit.twig
■src/Eccube/Resource/template/admin/Content/page.twig
■src/Eccube/Resource/template/admin/Content/page_edit.twig

■src/Eccube/Resource/template/admin/Customer/edit.twig

■src/Eccube/Resource/template/admin/Form/form_layout.twig

■src/Eccube/Resource/template/admin/Order/search_customer.twig
■src/Eccube/Resource/template/admin/Order/edit.twig
■src/Eccube/Resource/template/admin/Order/index.twig
■src/Eccube/Resource/template/admin/Order/mail.twig
■src/Eccube/Resource/template/admin/Order/mail_all.twig
■src/Eccube/Resource/template/admin/Order/order_detail_prototype.twig
■src/Eccube/Resource/template/admin/Order/search_product.twig
■src/Eccube/Resource/template/admin/Order/shipment_item_prototype.twig

■src/Eccube/Resource/template/admin/Product/index.twig
■src/Eccube/Resource/template/admin/Product/product.twig

■src/Eccube/Resource/template/admin/Setting/Shop/customer_agreement.twig
■src/Eccube/Resource/template/admin/Setting/Shop/delivery_edit.twig
■src/Eccube/Resource/template/admin/Setting/Shop/mail.twig
■src/Eccube/Resource/template/admin/Setting/Shop/payment_edit.twig
■src/Eccube/Resource/template/admin/Setting/Shop/point.twig
■src/Eccube/Resource/template/admin/Setting/Shop/shop_master.twig
■src/Eccube/Resource/template/admin/Setting/Shop/tax_rule.twig
■src/Eccube/Resource/template/admin/Setting/Shop/tradelaw.twig

■src/Eccube/Resource/template/admin/Setting/System/masterdata.twig
■src/Eccube/Resource/template/admin/Setting/System/member_edit.twig
■src/Eccube/Resource/template/admin/Setting/System/system.twig

■src/Eccube/Resource/template/admin/Store/authentication_setting.twig
■src/Eccube/Resource/template/admin/Store/plugin.twig
■src/Eccube/Resource/template/admin/Store/plugin_table.twig
■src/Eccube/Resource/template/admin/Store/template.twig
■src/Eccube/Resource/template/admin/Store/unregisterd_plugin_table.twig

———————————————

■src/Eccube/Resource/template/default/Block/news.twig

■src/Eccube/Resource/template/default/Form/form_layout.twig

■src/Eccube/Resource/template/default/Mypage/history.twig

■src/Eccube/Resource/template/default/Shopping/index.twig

********** src/Eccube/Service/ **********

■src/Eccube/Service/PluginService.php

********** src/Eccube/ServiceProvider/ **********

■src/Eccube/ServiceProvider/EccubeServiceProvider.php

********** src/Eccube/Twig/ **********

■src/Eccube/Twig/Extension/EccubeExtension.php