Add option to delay requests by a specified amount of milliseconds

[exside]

default is of course 0 if not specified, works like this:

		$.ajaxQueue({
			url: 'https://httpbin.org/get',
			delay: 1000
		}).done(function(data) {
			console.log('success');
			console.log(data);
		}).fail(function() {
			console.log('failed');
		});