Added a text field magento_notes to sale line #1879

Task ID: project-1735/task-1879
Review ID: 222001
Merge pull request #53 from priyankarani/feature/task-1891

Button to import order states #1891
Merge pull request #51 from prakashpp/feature/task-1879

Added a text field magento_notes to sale line #1879
Export product stock information to magento #1876 fixes #45

This patch exports stock information about product for current website
to magento.

Task ID: project-1735/task-1876
Review ID: 215002