We want to localize the default event radius options: 
"within 1 mile 5 miles 10 miles 25 miles 50 miles 100 miles"

How do we change the values to:
"within 1/2 mile, 1 mile, 2 miles, 3 miles, 5 miles, 10 miles"

This page: 
http://nationbuilder.com/calendar_page_variables
doesn't seem to include documentation on:
  {{ page.calendar.distance_radio_buttons }} 

(although I see it in the template).