Basic Paginator
Usage:
var Paginator = require("basic-paginator"),
content = ["a","b","c","d"],
itemsPerPage = 3;
var paginator = new Paginator(content, itemsPerPage);
// get the first page
paginator.page(1);
// returns ["a","b","c"]
// get the second page
paginator.page(2);
// returns ["d"]
// get a page that doesn't exist
paginator.page(3);
// returns []