This module will allow you to define a set radius from 0 to any other
value in your selected unit of measure (imperial or metric).
This defined zone around your shipping area can have a defined
cost associated with it from 0 to any other value.
Distance outside of this defined radius will incur charges based on the following formula:
shipping cost = (define zone cost + ((total distance shipped - base radius) * per unit of measure)
Distance is rounded up to nearest KM or mile.
requests are sent in ssl mode (I may change this later but would fully expect people to use SSL in the checkout section)