Template:Sportname at the YYYY Winter Olympics category/doc

Category header template for categories of the form "Sportname at the YYYY Winter Olympics", e.g. Category:Bobsleigh at the 2002 Winter Olympics or Category:Luge at the 1968 Winter Olympics

Creates:
 * a category header, including location
 * a navbox to other years,
 * a "see also" link to the article on " at the YYYY Winter Olympics" (if it exists)
 * parent categories.

Needs no parameters.