Added the getTime method

Added the getTime method which returns a Date object, the hours and minutes will be added to today.

``` javascript
// Get the time of single clockpicker
var dateObject = $('#demo-input').clockpicker('getTime');
console.log(dateObject);

// Get the time of a clockpicker list
$('.clockpicker').clockpicker('getTime', function(dateObject) {
    // The clockpicker element
    console.log(this);
    console.log(dateObject);
});
```

Also allows you to add a Date object as the 'default' options.
It will only use the Date object to get the time. It will not update the Date object when the time changes

``` javascript
$('#single-input').clockpicker({
	'default': new Date('Wed, 09 Aug 1995 13:15:00')
});
```
Should the first `+` be there?