Used to create links used for webapps and stuff.
###Usage
Create new page from *http.Request
// a pagingation configuration
config := pagination.Config{
PageSize: 20,
PagePadding: 3,
PageParam: "_page",
ShowFirst: true,
ShowLast: true,
}
// total number of items
totalItems := 200
page := pagination.NewPage(request, totalItems, config)