Revert "Fix parameter routes with an extension (/foo/:id.json)"

This reverts commit cf7b555.

router.go

@@ -68,7 +68,7 @@ func (r *Router) Add(method, path string, h HandlerFunc) {
  j := i + 1
 
  r.insert(method, path[:i], nil, skind, "", nil)
- for ; i < l && path[i] != '/' && path[i] != '.'; i++ {
+ for ; i < l && path[i] != '/'; i++ {
  }
 
  pnames = append(pnames, path[j:i])