# Functions
FromRequest builds the PageParams from an http.Request.
# Constants
DefaultLimit is the default pagination limit, if one is not provided.
MaxLimit is the maximum size for a single pagination.
QueryKeyLimit is the URL querystring for the current per-page limit.
QueryKeyPage is the URL querystring for the current page.
# Variables
UnlimitedResults is a paginator that doesn't do pagination and returns all results (up to (1<<63)-1).
# Structs
Page represents a single page.
PageParams are the page parameters including the current page and per page limit.
Paginator is a meta-struct that holds pagination information.