Added version number and format as an option

- Added version number. Defaulted to 1.1 since I'm not sure.

Example: 

	console.log( $.fn.simpleDatePicker.version == "1.1" ); // true
	
- Added `options.format` as a option to override the default date formatter.

Example: 
	
	var options = {};
	options.format = function(date) {
		var MMDDYYYY = (1+date.getMonth()) + '/' + date.getDate() + '/' + date.getFullYear();
		return MMDDYYYY.replace( new RegExp("\\b(\\d)\\b", "g"), "0$1");
	};

	$('#date').simpleDatePicker( options );
	$('#c').click(function() {
	$('#date').simpleDatePicker({command: 'toggle'})
	return false;
	})