Home delivery by action radius

This new module enables to define, automatically, the distance that a shop is willing to make home deliveries.

The distance is calculated according to Haversine formula, and should be indicated in Km. The result can be visualized as a circumference around the point where the store is located, and the indicated distance corresponds to the value of the circumference radius. For example, you can say that you are able to make home deliveries within a radius of 20 Km from the store.