* Feature - Define time frames/time slots for each delivery day.
* Feature - Choose the available shipping methods for each delivery day and its time frames.
* Tweak - Added compatibility with WC 3.5.
* Tweak - Moved the delivery fields to their own meta box in the 'edit-order' and 'edit-subscription' screens.
* Tweak - Set the default value of 'end_date' parameter to the 'max_delivery_days' setting value when calculating the first delivery date.
* Tweak - Changed to 'internal' the note added to a subscription when the delivery details are updated due to a change of the next payment date.
* Tweak - Sanitized the template content before output them.
* Tweak - Minified the CSS files.
* Fix - Process renewal orders that come from a failed status.
* Fix - Convert 'truly' and 'falsy' parameters to booleans before use them to configure the datepicker in the javascript files.
* Fix - Replaced '$customer_note' variable by '$note' in the template 'emails/plain/admin-subscription-delivery-note.php'.
* Dev - Updated jquery.timepicker.js library to the version 1.11.14.
* Dev - Replaced boolean settings values from '0' and '1' to 'yes' and 'no'.
* Dev - Split the 'wc-od-functions.php' file into multiple files.
* Dev - Updated plugin templates.
