New features and improvements

• Send Dangerous Goods line fields in BookShipment request.
• Schenker Sweden - add validation on Sender and Pickup postcode.
• Support for Sender Reference in Document Editor.
• Support for custom fields on Services when using Shipping Rules and Ship Advisor.
• Support for total weight amount and calculated value in each category on Danske Fragtmænd Fragtbrev.
• DHL Sweden waybill improvements.
• Add support for gif images on UPS COD document.
• Validation on delivery and pickup dates.
• Translate default text from Price Calculation response to English when no calculation is active.
• Various security improvements.