Add the jQuery UI Autocomplete wrapper

Hi! I have seen many implementations of jQuery UI Autocomplete in angular UI, but there are no complete implementations. Here is the code for the autocomplete which can use all the options you can pass into a jQuery UI autocomplete. See my blog post for details: [angular jQuery UI autocomplete](http://sharepointkunskap.wordpress.com/2013/01/04/angular-jquery-ui-autocomplete/)